Merge branch 'master' into develop

# Conflicts: # README.md
2021-02-14 05:05:19 -06:00 · 2021-02-14 05:05:19 -06:00 · 3ef5a7a21b
parent d120bae566 c7a65649c2
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--- a/README.md
+++ b/README.md
@ -20,6 +20,11 @@
 - [Español](translations/README-es.md)
 - [Português Brasileiro](translations/README-ptbr.md)
 - [Polish](translations/README-pl.md)
 - [繁體中文](translations/README-tw.md)
 - [Japanese (日本語)](translations/README-ja.md)
 - [Russian](translations/README-ru.md)
 - [German](translations/README-de.md)
 - [Bahasa Indonesia](translations/README-id.md)
 - [ខ្មែរ - Khmer](translations/README-kh.md)
 </details>
@ -29,20 +34,17 @@
 - [हिन्दी](https://github.com/jwasham/coding-interview-university/issues/81)
 - [עברית](https://github.com/jwasham/coding-interview-university/issues/82)
 - [Bahasa Indonesia](https://github.com/jwasham/coding-interview-university/issues/101)
 - [Arabic](https://github.com/jwasham/coding-interview-university/issues/98)
 - [Turkish](https://github.com/jwasham/coding-interview-university/issues/90)
 - [French](https://github.com/jwasham/coding-interview-university/issues/89)
 - [Russian](https://github.com/jwasham/coding-interview-university/issues/87)
 - [Ukrainian](https://github.com/jwasham/coding-interview-university/issues/106)
 - [Korean(한국어)](https://github.com/jwasham/coding-interview-university/issues/118)
 - [Telugu](https://github.com/jwasham/coding-interview-university/issues/117)
- [Urdu](https://github.com/jwasham/coding-interview-university/issues/140)
+- [Urdu](https://github.com/jwasham/coding-interview-university/issues/519)
 - [Thai](https://github.com/jwasham/coding-interview-university/issues/156)
 - [Greek](https://github.com/jwasham/coding-interview-university/issues/166)
 - [Italian](https://github.com/jwasham/coding-interview-university/issues/170)
 - [Malayalam](https://github.com/jwasham/coding-interview-university/issues/239)
 - [Japanese (日本語)](https://github.com/jwasham/coding-interview-university/issues/257)
 </details>
@ -75,8 +77,8 @@ If you want to be a reliability engineer or operations engineer, study more from
 - [Book List](#book-list)
 - [Before you Get Started](#before-you-get-started)
 - [What you Won't See Covered](#what-you-wont-see-covered)
 - [Prerequisite Knowledge](#prerequisite-knowledge)
 - [The Daily Plan](#the-daily-plan)
 - [Prerequisite Knowledge](#prerequisite-knowledge)
 - [Algorithmic complexity / Big-O / Asymptotic analysis](#algorithmic-complexity--big-o--asymptotic-analysis)
 - [Data Structures](#data-structures)
    - [Arrays](#arrays)
@ -201,9 +203,14 @@ I'm using Github's special markdown flavor, including tasks lists to check progr
 **Create a new branch so you can check items like this, just put an x in the brackets: [x]**
    Fork a branch and follow the commands below
 Fork the GitHub repo https://github.com/jwasham/coding-interview-university by clicking on the Fork button
    Clone to your local repo
 `git clone git@github.com:<your_github_username>/coding-interview-university.git`
 `git checkout -b progress`
 `git remote add jwasham https://github.com/jwasham/coding-interview-university`
@ -216,7 +223,9 @@ I'm using Github's special markdown flavor, including tasks lists to check progr
 `git commit -m "Marked x"`
-`git rebase jwasham/master`
+`git rebase jwasham/main`
 `git push --set-upstream origin progress`
 `git push --force`
@ -240,16 +249,16 @@ Sometimes the classes are not in session so you have to wait a couple of months,
 ## Interview Process & General Interview Prep
- [ ] [ABC: Always Be Coding](https://medium.com/always-be-coding/abc-always-be-coding-d5f8051afce2#.4heg8zvm4)
+- [ ] [How to Pass the Engineering Interview in 2021](https://davidbyttow.medium.com/how-to-pass-the-engineering-interview-in-2021-45f1b389a1)
 - [ ] [Whiteboarding](https://medium.com/@dpup/whiteboarding-4df873dbba2e#.hf6jn45g1)
 - [ ] [Effective Whiteboarding during Programming Interviews](http://www.coderust.com/blog/2014/04/10/effective-whiteboarding-during-programming-interviews/)
 - [ ] [Demystifying Tech Recruiting](https://www.youtube.com/watch?v=N233T0epWTs)
 - [ ] How to Get a Job at the Big 4:
    - [ ] [How to Get a Job at the Big 4 - Amazon, Facebook, Google & Microsoft (video)](https://www.youtube.com/watch?v=YJZCUhxNCv8)
    - [ ] [How to Get a Job at the Big 4.1 (Follow-up video)](https://www.youtube.com/watch?v=6790FVXWBw8&feature=youtu.be)
 - [ ] Cracking The Coding Interview Set 1:
    - [ ] [Gayle L McDowell - Cracking The Coding Interview (video)](https://www.youtube.com/watch?v=rEJzOhC5ZtQ)
    - [ ] [Cracking the Coding Interview with Author Gayle Laakmann McDowell (video)](https://www.youtube.com/watch?v=aClxtDcdpsQ)
- [ ] Cracking the Facebook Coding Interview
+- [ ] Cracking the Facebook Coding Interview:
    - [ ] [The Approach](https://www.youtube.com/watch?v=wCl9kvQGHPI)
    - [ ] [Problem Walkthrough](https://www.youtube.com/watch?v=4UWDyJq8jZg)
 - [ ] Prep Course:
@ -261,6 +270,8 @@ Sometimes the classes are not in session so you have to wait a couple of months,
        - A free Python centric data structures and algorithms course.
    - [ ] [Data Structures and Algorithms Nanodegree! (Udacity paid Nanodegree)](https://www.udacity.com/course/data-structures-and-algorithms-nanodegree--nd256):
        - Get hands-on practice with over 100 data structures and algorithm exercises and guidance from a dedicated mentor to help prepare you for interviews and on-the-job scenarios.
    - [ ] [Grokking the Behavioral Interview (Educative free course)](https://www.educative.io/courses/grokking-the-behavioral-interview):
        - Many times, it’s not your technical competency that holds you back from landing your dream job, it’s how you perform on the behavioral interview.
 ## Pick One Language for the Interview
@ -275,7 +286,7 @@ You could also use these, but read around first. There may be caveats:
 - JavaScript
 - Ruby
-Here is an article I wrote about choosing a language for the interview: [Pick One Language for the Coding Interview](https://startupnextdoor.com/important-pick-one-language-for-the-coding-interview/)
+Here is an article I wrote about choosing a language for the interview: [Pick One Language for the Coding Interview](https://startupnextdoor.com/important-pick-one-language-for-the-coding-interview/).
 You need to be very comfortable in the language and be knowledgeable.
@ -327,6 +338,9 @@ I haven't read these two, but they are highly rated and written by Sedgewick. He
 - [ ] [Algorithms in C++, Parts 1-4: Fundamentals, Data Structure, Sorting, Searching](https://www.amazon.com/Algorithms-Parts-1-4-Fundamentals-Structure/dp/0201350882/)
 - [ ] [Algorithms in C++ Part 5: Graph Algorithms](https://www.amazon.com/Algorithms-Part-Graph-3rd-Pt-5/dp/0201361183/)
 - [ ] [Open Data Structures in C++](https://opendatastructures.org/ods-cpp.pdf)
    - Rich and detailed collection of Data Structures and Algorithms
    - Great for first-timers
 If you have a better recommendation for C++, please let me know. Looking for a comprehensive resource.
@ -342,16 +356,16 @@ OR:
 - [ ] [Data Structures and Algorithms in Java](https://www.amazon.com/Data-Structures-Algorithms-Michael-Goodrich/dp/1118771338/)
    - by Goodrich, Tamassia, Goldwasser
    - used as optional text for CS intro course at UC Berkeley
-    - see my book report on the Python version below. This book covers the same topics.
+    - see my book report on the Python version below. This book covers the same topics
 ### Python
 - [ ] [Data Structures and Algorithms in Python](https://www.amazon.com/Structures-Algorithms-Python-Michael-Goodrich/dp/1118290275/)
    - by Goodrich, Tamassia, Goldwasser
-    - I loved this book. It covered everything and more.
+    - I loved this book. It covered everything and more
    - Pythonic code
    - my glowing book report: https://startupnextdoor.com/book-report-data-structures-and-algorithms-in-python/
-
+- [ ] [Open Data Structures in Python](https://opendatastructures.org/ods-python.pdf)
 ## Before you Get Started
@ -362,26 +376,26 @@ Here are some mistakes I made so you'll have a better experience.
 ### 1. You Won't Remember it All
 I watched hours of videos and took copious notes, and months later there was much I didn't remember. I spent 3 days going
-through my notes and making flashcards so I could review.
+through my notes and making flashcards, so I could review.
-Read please so you won't make my mistakes:
+Please, read so you won't make my mistakes:
 [Retaining Computer Science Knowledge](https://startupnextdoor.com/retaining-computer-science-knowledge/).
-A course recommended to me (haven't taken it): [Learning how to Learn](https://www.coursera.org/learn/learning-how-to-learn)
+A course recommended to me (haven't taken it): [Learning how to Learn](https://www.coursera.org/learn/learning-how-to-learn).
 ### 2. Use Flashcards
 To solve the problem, I made a little flashcards site where I could add flashcards of 2 types: general and code.
 Each card has different formatting.
-I made a mobile-first website so I could review on my phone and tablet, wherever I am.
+I made a mobile-first website, so I could review on my phone and tablet, wherever I am.
 Make your own for free:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required.
@ -392,16 +406,16 @@ your brain.
 An alternative to using my flashcard site is [Anki](http://ankisrs.net/), which has been recommended to me numerous times. It uses a repetition system to help you remember.
 It's user-friendly, available on all platforms and has a cloud sync system. It costs $25 on iOS but is free on other platforms.
-My flashcard database in Anki format: https://ankiweb.net/shared/info/25173560 (thanks [@xiewenya](https://github.com/xiewenya))
+My flashcard database in Anki format: https://ankiweb.net/shared/info/25173560 (thanks [@xiewenya](https://github.com/xiewenya)).
-### 3. Start doing coding interview questions while you're learning data structures and algorithms, 
+### 3. Start doing coding interview questions while you're learning data structures and algorithms
-You need to apply what you're learning to solving problems, or you'll forget. I made this mistake. Once you've learned a topic, 
+You need to apply what you're learning to solving problems, or you'll forget. I made this mistake. Once you've learned a topic,
-and feel comfortable with it, like linked lists, open one of the coding interview books and do a couple of questions regarding 
+and feel comfortable with it, like linked lists, open one of the coding interview books and do a couple of questions regarding
-linked lists. Then move on to the next learning topic. Then later, go back and do another linked list problem, 
+linked lists. Then move on to the next learning topic. Then later, go back and do another linked list problem,
-or recursion problem, or whatever. But keep doing problems while you're learning. You're not being hired for knowledge, 
+or recursion problem, or whatever. But keep doing problems while you're learning. You're not being hired for knowledge,
-but how you apply the knowledge. There are several books and sites I recommend. 
+but how you apply the knowledge. There are several books and sites I recommend.
-See here for more: [Coding Question Practice](#coding-question-practice)
+See here for more: [Coding Question Practice](#coding-question-practice).
 ### 4. Review, review, review
@ -411,7 +425,7 @@ Take a break from programming problems for a half hour and go through your flash
 ### 5. Focus
-There are a lot of distractions that can take up valuable time. Focus and concentration are hard. Turn on some music 
+There are a lot of distractions that can take up valuable time. Focus and concentration are hard. Turn on some music
 without lyrics and you'll be able to focus pretty well.
 ## What you won't see covered
@ -427,19 +441,19 @@ These are prevalent technologies but not part of this study plan:
 Some subjects take one day, and some will take multiple days. Some are just learning with nothing to implement.
 Each day I take one subject from the list below, watch videos about that subject, and write an implementation in:
- C - using structs and functions that take a struct * and something else as args.
+- C - using structs and functions that take a struct * and something else as args
 - C++ - without using built-in types
 - C++ - using built-in types, like STL's std::list for a linked list
 - Python - using built-in types (to keep practicing Python)
 - and write tests to ensure I'm doing it right, sometimes just using simple assert() statements
- You may do Java or something else, this is just my thing.
+- You may do Java or something else, this is just my thing
 You don't need all these. You need only [one language for the interview](#pick-one-language-for-the-interview).
 Why code in all of these?
 - Practice, practice, practice, until I'm sick of it, and can do it with no problem (some have many edge cases and bookkeeping details to remember)
 - Work within the raw constraints (allocating/freeing memory without help of garbage collection (except Python or Java))
- Make use of built-in types so I have experience using the built-in tools for real-world use (not going to write my own linked list implementation in production)
+- Make use of built-in types, so I have experience using the built-in tools for real-world use (not going to write my own linked list implementation in production)
 I may not have time to do all of these for every subject, but I'll try.
@ -455,11 +469,11 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 ## Prerequisite Knowledge
 - [ ] **Learn C**
-    - C is everywhere. You'll see examples in books, lectures, videos, *everywhere* while you're studying.
+    - C is everywhere. You'll see examples in books, lectures, videos, *everywhere* while you're studying
-    - [ ] [C Programming Language, Vol 2](https://www.amazon.com/Programming-Language-Brian-W-Kernighan/dp/0131103628)
+    - [ ] [The C Programming Language, Vol 2](https://www.amazon.com/Programming-Language-Brian-W-Kernighan/dp/0131103628)
        - This is a short book, but it will give you a great handle on the C language and if you practice it a little
-            you'll quickly get proficient. Understanding C helps you understand how programs and memory work.
+            you'll quickly get proficient. Understanding C helps you understand how programs and memory work
-        - [answers to questions](https://github.com/lekkas/c-algorithms)
+        - [Answers to questions](https://github.com/lekkas/c-algorithms)
 - [ ] **How computers process a program:**
    - [ ] [How CPU executes a program (video)](https://www.youtube.com/watch?v=XM4lGflQFvA)
@ -471,14 +485,14 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 ## Algorithmic complexity / Big-O / Asymptotic analysis
 - Nothing to implement
- There are a lot of videos here. Just watch enough until you understand it. You can always come back and review.
+- There are a lot of videos here. Just watch enough until you understand it. You can always come back and review
- If some of the lectures are too mathy, you can jump down to the bottom and watch the discrete mathematics videos to get the background knowledge.
+- If some lectures are too mathy, you can jump down to the bottom and watch the discrete mathematics videos to get the background knowledge
 - [ ] [Harvard CS50 - Asymptotic Notation (video)](https://www.youtube.com/watch?v=iOq5kSKqeR4)
 - [ ] [Big O Notations (general quick tutorial) (video)](https://www.youtube.com/watch?v=V6mKVRU1evU)
 - [ ] [Big O Notation (and Omega and Theta) - best mathematical explanation (video)](https://www.youtube.com/watch?v=ei-A_wy5Yxw&index=2&list=PL1BaGV1cIH4UhkL8a9bJGG356covJ76qN)
 - [ ] Skiena:
    - [video](https://www.youtube.com/watch?v=gSyDMtdPNpU&index=2&list=PLOtl7M3yp-DV69F32zdK7YJcNXpTunF2b)
-    - [slides](http://www3.cs.stonybrook.edu/~algorith/video-lectures/2007/lecture2.pdf)
+    - [slides](https://archive.org/details/lecture2_202008)
 - [ ] [A Gentle Introduction to Algorithm Complexity Analysis](http://discrete.gr/complexity/)
 - [ ] [Orders of Growth (video)](https://www.coursera.org/lecture/algorithmic-thinking-1/orders-of-growth-6PKkX)
 - [ ] [Asymptotics (video)](https://www.coursera.org/lecture/algorithmic-thinking-1/asymptotics-bXAtM)
@ -496,17 +510,13 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 - ### Arrays
    - Implement an automatically resizing vector.
    - [ ] Description:
-        - [Arrays (video)](https://www.coursera.org/learn/data-structures/lecture/OsBSF/arrays)
+        - [Arrays (video)](https://www.coursera.org/lecture/data-structures/arrays-OsBSF)
        - [UC Berkeley CS61B - Linear and Multi-Dim Arrays (video)](https://archive.org/details/ucberkeley_webcast_Wp8oiO_CZZE) (Start watching from 15m 32s)
-        - [Basic Arrays (video)](https://archive.org/details/0102WhatYouShouldKnow/02_04-basicArrays.mp4)
+        - [Dynamic Arrays (video)](https://www.coursera.org/lecture/data-structures/dynamic-arrays-EwbnV)
        - [Multi-dim (video)](https://archive.org/details/0102WhatYouShouldKnow/02_05-multidimensionalArrays.mp4)
        - [Dynamic Arrays (video)](https://www.coursera.org/learn/data-structures/lecture/EwbnV/dynamic-arrays)
        - [Jagged Arrays (video)](https://www.youtube.com/watch?v=1jtrQqYpt7g)
        - [Jagged Arrays (video)](https://archive.org/details/0102WhatYouShouldKnow/02_06-jaggedArrays.mp4)
        - [Resizing arrays (video)](https://archive.org/details/0102WhatYouShouldKnow/03_01-resizableArrays.mp4)
    - [ ] Implement a vector (mutable array with automatic resizing):
        - [ ] Practice coding using arrays and pointers, and pointer math to jump to an index instead of using indexing.
-        - [ ] new raw data array with allocated memory
+        - [ ] New raw data array with allocated memory
            - can allocate int array under the hood, just not use its features
            - start with 16, or if starting number is greater, use power of 2 - 16, 32, 64, 128
        - [ ] size() - number of items
@ -532,20 +542,20 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 - ### Linked Lists
    - [ ] Description:
-        - [ ] [Singly Linked Lists (video)](https://www.coursera.org/learn/data-structures/lecture/kHhgK/singly-linked-lists)
+        - [ ] [Singly Linked Lists (video)](https://www.coursera.org/lecture/data-structures/singly-linked-lists-kHhgK)
        - [ ] [CS 61B - Linked Lists 1 (video)](https://archive.org/details/ucberkeley_webcast_htzJdKoEmO0)
        - [ ] [CS 61B - Linked Lists 2 (video)](https://archive.org/details/ucberkeley_webcast_-c4I3gFYe3w)
    - [ ] [C Code (video)](https://www.youtube.com/watch?v=QN6FPiD0Gzo)
-            - not the whole video, just portions about Node struct and memory allocation.
+            - not the whole video, just portions about Node struct and memory allocation
    - [ ] Linked List vs Arrays:
-        - [Core Linked Lists Vs Arrays (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/rjBs9/core-linked-lists-vs-arrays)
+        - [Core Linked Lists Vs Arrays (video)](https://www.coursera.org/lecture/data-structures-optimizing-performance/core-linked-lists-vs-arrays-rjBs9)
-        - [In The Real World Linked Lists Vs Arrays (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/QUaUd/in-the-real-world-lists-vs-arrays)
+        - [In The Real World Linked Lists Vs Arrays (video)](https://www.coursera.org/lecture/data-structures-optimizing-performance/in-the-real-world-lists-vs-arrays-QUaUd)
    - [ ] [why you should avoid linked lists (video)](https://www.youtube.com/watch?v=YQs6IC-vgmo)
    - [ ] Gotcha: you need pointer to pointer knowledge:
        (for when you pass a pointer to a function that may change the address where that pointer points)
        This page is just to get a grasp on ptr to ptr. I don't recommend this list traversal style. Readability and maintainability suffer due to cleverness.
        - [Pointers to Pointers](https://www.eskimo.com/~scs/cclass/int/sx8.html)
-    - [ ] implement (I did with tail pointer & without):
+    - [ ] Implement (I did with tail pointer & without):
        - [ ] size() - returns number of data elements in list
        - [ ] empty() - bool returns true if empty
        - [ ] value_at(index) - returns the value of the nth item (starting at 0 for first)
@ -561,19 +571,16 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - [ ] reverse() - reverses the list
        - [ ] remove_value(value) - removes the first item in the list with this value
    - [ ] Doubly-linked List
-        - [Description (video)](https://www.coursera.org/learn/data-structures/lecture/jpGKD/doubly-linked-lists)
+        - [Description (video)](https://www.coursera.org/lecture/data-structures/doubly-linked-lists-jpGKD)
        - No need to implement
 - ### Stack
-    - [ ] [Stacks (video)](https://www.coursera.org/learn/data-structures/lecture/UdKzQ/stacks)
+    - [ ] [Stacks (video)](https://www.coursera.org/lecture/data-structures/stacks-UdKzQ)
-    - [ ] [Using Stacks Last-In First-Out (video)](https://archive.org/details/0102WhatYouShouldKnow/05_01-usingStacksForLast-inFirst-out.mp4)
+    - [ ] Will not implement. Implementing with array is trivial
    - [ ] Will not implement. Implementing with array is trivial.
 - ### Queue
    - [ ] [Using Queues First-In First-Out(video)](https://archive.org/details/0102WhatYouShouldKnow/05_03-usingQueuesForFirst-inFirst-out.mp4)
    - [ ] [Queue (video)](https://www.coursera.org/lecture/data-structures/queues-EShpq)
    - [ ] [Circular buffer/FIFO](https://en.wikipedia.org/wiki/Circular_buffer)
    - [ ] [Priority Queues (video)](https://archive.org/details/0102WhatYouShouldKnow/05_04-priorityQueuesAndDeques.mp4)
    - [ ] Implement using linked-list, with tail pointer:
        - enqueue(value) - adds value at position at tail
        - dequeue() - returns value and removes least recently added element (front)
@ -600,18 +607,14 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - [ ] [(Advanced) Perfect hashing (video)](https://www.youtube.com/watch?v=N0COwN14gt0&list=PL2B4EEwhKD-NbwZ4ezj7gyc_3yNrojKM9&index=4)
    - [ ] Online Courses:
-        - [ ] [Understanding Hash Functions (video)](https://archive.org/details/0102WhatYouShouldKnow/06_02-understandingHashFunctions.mp4)
+        - [ ] [Core Hash Tables (video)](https://www.coursera.org/lecture/data-structures-optimizing-performance/core-hash-tables-m7UuP)
        - [ ] [Using Hash Tables (video)](https://archive.org/details/0102WhatYouShouldKnow/06_03-usingHashTables.mp4)
        - [ ] [Supporting Hashing (video)](https://archive.org/details/0102WhatYouShouldKnow/06_04-supportingHashing.mp4)
        - [ ] [Language Support Hash Tables (video)](https://archive.org/details/0102WhatYouShouldKnow/06_05-languageSupportForHashTables.mp4)
        - [ ] [Core Hash Tables (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/m7UuP/core-hash-tables)
        - [ ] [Data Structures (video)](https://www.coursera.org/learn/data-structures/home/week/4)
-        - [ ] [Phone Book Problem (video)](https://www.coursera.org/learn/data-structures/lecture/NYZZP/phone-book-problem)
+        - [ ] [Phone Book Problem (video)](https://www.coursera.org/lecture/data-structures/phone-book-problem-NYZZP)
        - [ ] distributed hash tables:
-            - [Instant Uploads And Storage Optimization In Dropbox (video)](https://www.coursera.org/learn/data-structures/lecture/DvaIb/instant-uploads-and-storage-optimization-in-dropbox)
+            - [Instant Uploads And Storage Optimization In Dropbox (video)](https://www.coursera.org/lecture/data-structures/instant-uploads-and-storage-optimization-in-dropbox-DvaIb)
-            - [Distributed Hash Tables (video)](https://www.coursera.org/learn/data-structures/lecture/tvH8H/distributed-hash-tables)
+            - [Distributed Hash Tables (video)](https://www.coursera.org/lecture/data-structures/distributed-hash-tables-tvH8H)
-    - [ ] implement with array using linear probing
+    - [ ] Implement with array using linear probing
        - hash(k, m) - m is size of hash table
        - add(key, value) - if key already exists, update value
        - exists(key)
@ -629,7 +632,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -641,24 +644,24 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - [ ] [The Bit Twiddler](https://bits.stephan-brumme.com/)
        - [ ] [The Bit Twiddler Interactive](https://bits.stephan-brumme.com/interactive.html)
        - [ ] [Bit Hacks (video)](https://www.youtube.com/watch?v=ZusiKXcz_ac)
 		- [ ] [Practice Operations](https://pconrad.github.io/old_pconrad_cs16/topics/bitOps/)
    - [ ] 2s and 1s complement
        - [Binary: Plusses & Minuses (Why We Use Two's Complement) (video)](https://www.youtube.com/watch?v=lKTsv6iVxV4)
        - [1s Complement](https://en.wikipedia.org/wiki/Ones%27_complement)
        - [2s Complement](https://en.wikipedia.org/wiki/Two%27s_complement)
-    - [ ] count set bits
+    - [ ] Count set bits
        - [4 ways to count bits in a byte (video)](https://youtu.be/Hzuzo9NJrlc)
        - [Count Bits](https://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetKernighan)
        - [How To Count The Number Of Set Bits In a 32 Bit Integer](http://stackoverflow.com/questions/109023/how-to-count-the-number-of-set-bits-in-a-32-bit-integer)
-    - [ ] swap values:
+    - [ ] Swap values:
        - [Swap](https://bits.stephan-brumme.com/swap.html)
-    - [ ] absolute value:
+    - [ ] Absolute value:
        - [Absolute Integer](https://bits.stephan-brumme.com/absInteger.html)
 ## Trees
 - ### Trees - Notes & Background
-    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
+    - [ ] [Series: Trees (video)](https://www.coursera.org/lecture/data-structures/trees-95qda)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
    - manipulation algorithms
@ -677,9 +680,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
            - preorder (DFS: self, left, right)
 - ### Binary search trees: BSTs
-    - [ ] [Binary Search Tree Review (video)](https://www.youtube.com/watch?v=x6At0nzX92o&index=1&list=PLA5Lqm4uh9Bbq-E0ZnqTIa8LRaL77ica6)
+    - [ ] [Binary Search Tree Review (video)](https://www.youtube.com/watch?v=x6At0nzX92o&index=1&list=PLA5Lqm4uh9Bbq-E0ZnqTIa8LRaL77ica6)    
    - [ ] [Series (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/p82sw/core-introduction-to-binary-search-trees)
        - starts with symbol table and goes through BST applications
    - [ ] [Introduction (video)](https://www.coursera.org/learn/data-structures/lecture/E7cXP/introduction)
    - [ ] [MIT (video)](https://www.youtube.com/watch?v=9Jry5-82I68)
    - C/C++:
@ -732,15 +733,14 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - [ ] sift_down - needed for extract_max
        - [ ] remove(i) - removes item at index x
        - [ ] heapify - create a heap from an array of elements, needed for heap_sort
-        - [ ] heap_sort() - take an unsorted array and turn it into a sorted array in-place using a max heap
+        - [ ] heap_sort() - take an unsorted array and turn it into a sorted array in-place using a max heap or min heap
            - note: using a min heap instead would save operations, but double the space needed (cannot do in-place).
 ## Sorting
 - [ ] Notes:
    - Implement sorts & know best case/worst case, average complexity of each:
        - no bubble sort - it's terrible - O(n^2), except when n <= 16
-    - [ ] stability in sorting algorithms ("Is Quicksort stable?")
+    - [ ] Stability in sorting algorithms ("Is Quicksort stable?")
        - [Sorting Algorithm Stability](https://en.wikipedia.org/wiki/Sorting_algorithm#Stability)
        - [Stability In Sorting Algorithms](http://stackoverflow.com/questions/1517793/stability-in-sorting-algorithms)
        - [Stability In Sorting Algorithms](http://www.geeksforgeeks.org/stability-in-sorting-algorithms/)
@ -749,7 +749,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - I wouldn't recommend sorting a linked list, but merge sort is doable.
        - [Merge Sort For Linked List](http://www.geeksforgeeks.org/merge-sort-for-linked-list/)
- For heapsort, see Heap data structure above. Heap sort is great, but not stable.
+- For heapsort, see Heap data structure above. Heap sort is great, but not stable
 - [ ] [Sedgewick - Mergesort (5 videos)](https://www.coursera.org/learn/algorithms-part1/home/week/3)
    - [ ] [1. Mergesort](https://www.coursera.org/learn/algorithms-part1/lecture/ARWDq/mergesort)
@ -791,7 +791,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
    - [ ] Mergesort: O(n log n) average and worst case
    - [ ] Quicksort O(n log n) average case
    - Selection sort and insertion sort are both O(n^2) average and worst case
-    - For heapsort, see Heap data structure above.
+    - For heapsort, see Heap data structure above
 - [ ] Not required, but I recommended them:
    - [ ] [Sedgewick - Radix Sorts (6 videos)](https://www.coursera.org/learn/algorithms-part2/home/week/3)
@ -821,8 +821,8 @@ Graphs can be used to represent many problems in computer science, so this secti
        - adjacency list
        - adjacency map
    - Familiarize yourself with each representation and its pros & cons
-    - BFS and DFS - know their computational complexity, their tradeoffs, and how to implement them in real code
+    - BFS and DFS - know their computational complexity, their trade offs, and how to implement them in real code
-    - When asked a question, look for a graph-based solution first, then move on if none.
+    - When asked a question, look for a graph-based solution first, then move on if none
 - [ ] MIT(videos):
    - [ ] [Breadth-First Search](https://www.youtube.com/watch?v=s-CYnVz-uh4&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&index=13)
@ -878,8 +878,8 @@ Graphs can be used to represent many problems in computer science, so this secti
        - [ ] [Lecture 9 | Programming Abstractions (video)](https://www.youtube.com/watch?v=uFJhEPrbycQ&list=PLFE6E58F856038C69&index=9)
        - [ ] [Lecture 10 | Programming Abstractions (video)](https://www.youtube.com/watch?v=NdF1QDTRkck&index=10&list=PLFE6E58F856038C69)
        - [ ] [Lecture 11 | Programming Abstractions (video)](https://www.youtube.com/watch?v=p-gpaIGRCQI&list=PLFE6E58F856038C69&index=11)
-    - when it is appropriate to use it
+    - When it is appropriate to use it?
-    - how is tail recursion better than not?
+    - How is tail recursion better than not?
        - [ ] [What Is Tail Recursion Why Is It So Bad?](https://www.quora.com/What-is-tail-recursion-Why-is-it-so-bad)
        - [ ] [Tail Recursion (video)](https://www.youtube.com/watch?v=L1jjXGfxozc)
@ -990,16 +990,16 @@ Graphs can be used to represent many problems in computer science, so this secti
    - [What Is The Difference Between A Process And A Thread?](https://www.quora.com/What-is-the-difference-between-a-process-and-a-thread)
    - Covers:
        - Processes, Threads, Concurrency issues
-            - difference between processes and threads
+            - Difference between processes and threads
-            - processes
+            - Processes
-            - threads
+            - Threads
-            - locks
+            - Locks
-            - mutexes
+            - Mutexes
-            - semaphores
+            - Semaphores
-            - monitors
+            - Monitors
-            - how they work
+            - How they work?
-            - deadlock
+            - Deadlock
-            - livelock
+            - Livelock
        - CPU activity, interrupts, context switching
        - Modern concurrency constructs with multicore processors
        - [Paging, segmentation and virtual memory (video)](https://www.youtube.com/watch?v=LKe7xK0bF7o&list=PLCiOXwirraUCBE9i_ukL8_Kfg6XNv7Se8&index=2)
@ -1008,7 +1008,7 @@ Graphs can be used to represent many problems in computer science, so this secti
        - Thread resource needs (shares above (minus stack) with other threads in the same process but each has its own pc, stack counter, registers, and stack)
        - Forking is really copy on write (read-only) until the new process writes to memory, then it does a full copy.
        - Context switching
-            - How context switching is initiated by the operating system and underlying hardware
+            - How context switching is initiated by the operating system and underlying hardware?
    - [ ] [threads in C++ (series - 10 videos)](https://www.youtube.com/playlist?list=PL5jc9xFGsL8E12so1wlMS0r0hTQoJL74M)
    - [ ] concurrency in Python (videos):
        - [ ] [Short series on threads](https://www.youtube.com/playlist?list=PL1H1sBF1VAKVMONJWJkmUh6_p8g4F2oy1)
@ -1035,8 +1035,8 @@ Graphs can be used to represent many problems in computer science, so this secti
    - [ ] [How to write tests](http://jasonpolites.github.io/tao-of-testing/ch4-1.1.html)
 - ### Scheduling
-    - in an OS, how it works
+    - In an OS, how it works?
-    - can be gleaned from Operating System videos
+    - Can be gleaned from Operating System videos
 - ### String searching & manipulations
    - [ ] [Sedgewick - Suffix Arrays (video)](https://www.coursera.org/learn/algorithms-part2/lecture/TH18W/suffix-arrays)
@ -1048,12 +1048,12 @@ Graphs can be used to represent many problems in computer science, so this secti
        - [ ] [5. Rabin-Karp](https://www.coursera.org/learn/algorithms-part2/lecture/3KiqT/rabin-karp)
    - [ ] [Search pattern in text (video)](https://www.coursera.org/learn/data-structures/lecture/tAfHI/search-pattern-in-text)
-    If you need more detail on this subject, see "String Matching" section in [Additional Detail on Some Subjects](#additional-detail-on-some-subjects)
+    If you need more detail on this subject, see "String Matching" section in [Additional Detail on Some Subjects](#additional-detail-on-some-subjects).
 - ### Tries
    - Note there are different kinds of tries. Some have prefixes, some don't, and some use string instead of bits
-        to track the path.
+        to track the path
-    - I read through code, but will not implement.
+    - I read through code, but will not implement
    - [ ] [Sedgewick - Tries (3 videos)](https://www.coursera.org/learn/algorithms-part2/home/week/4)
        - [ ] [1. R Way Tries](https://www.coursera.org/learn/algorithms-part2/lecture/CPVdr/r-way-tries)
        - [ ] [2. Ternary Search Tries](https://www.coursera.org/learn/algorithms-part2/lecture/yQM8K/ternary-search-tries)
@ -1085,8 +1085,8 @@ Graphs can be used to represent many problems in computer science, so this secti
 - ### Networking
    - **if you have networking experience or want to be a reliability engineer or operations engineer, expect questions**
-    - otherwise, this is just good to know
+    - Otherwise, this is just good to know
-    - [ ] [Khan Academy](https://www.khanacademy.org/computing/computer-science/internet-intro)
+    - [ ] [Khan Academy](https://www.khanacademy.org/computing/computer-science/computers-and-internet-code-org)
    - [ ] [UDP and TCP: Comparison of Transport Protocols (video)](https://www.youtube.com/watch?v=Vdc8TCESIg8)
    - [ ] [TCP/IP and the OSI Model Explained! (video)](https://www.youtube.com/watch?v=e5DEVa9eSN0)
    - [ ] [Packet Transmission across the Internet. Networking & TCP/IP tutorial. (video)](https://www.youtube.com/watch?v=nomyRJehhnM)
@ -1106,13 +1106,13 @@ Graphs can be used to represent many problems in computer science, so this secti
 - Scalability and System Design are very large topics with many topics and resources, since
      there is a lot to consider when designing a software/hardware system that can scale.
-      Expect to spend quite a bit of time on this.
+      Expect to spend quite a bit of time on this
 - Considerations:
-    - scalability
+    - Scalability
        - Distill large data sets to single values
        - Transform one data set to another
        - Handling obscenely large amounts of data
-    - system design
+    - System design
        - features sets
        - interfaces
        - class hierarchies
@ -1126,12 +1126,12 @@ Graphs can be used to represent many problems in computer science, so this secti
 - [ ] [8 Things You Need to Know Before a System Design Interview](http://blog.gainlo.co/index.php/2015/10/22/8-things-you-need-to-know-before-system-design-interviews/)
 - [ ] [Algorithm design](http://www.hiredintech.com/algorithm-design/)
 - [ ] [Database Normalization - 1NF, 2NF, 3NF and 4NF (video)](https://www.youtube.com/watch?v=UrYLYV7WSHM)
- [ ] [System Design Interview](https://github.com/checkcheckzz/system-design-interview) - There are a lot of resources in this one. Look through the articles and examples. I put some of them below.
+- [ ] [System Design Interview](https://github.com/checkcheckzz/system-design-interview) - There are a lot of resources in this one. Look through the articles and examples. I put some of them below
 - [ ] [How to ace a systems design interview](http://www.palantir.com/2011/10/how-to-rock-a-systems-design-interview/)
 - [ ] [Numbers Everyone Should Know](http://everythingisdata.wordpress.com/2009/10/17/numbers-everyone-should-know/)
 - [ ] [How long does it take to make a context switch?](http://blog.tsunanet.net/2010/11/how-long-does-it-take-to-make-context.html)
 - [ ] [Transactions Across Datacenters (video)](https://www.youtube.com/watch?v=srOgpXECblk)
- [ ] [A plain English introduction to CAP Theorem](http://ksat.me/a-plain-english-introduction-to-cap-theorem/)
+- [ ] [A plain English introduction to CAP Theorem](http://ksat.me/a-plain-english-introduction-to-cap-theorem)
 - [ ] Consensus Algorithms:
    - [ ] Paxos - [Paxos Agreement - Computerphile (video)](https://www.youtube.com/watch?v=s8JqcZtvnsM)
    - [ ] Raft - [An Introduction to the Raft Distributed Consensus Algorithm (video)](https://www.youtube.com/watch?v=P9Ydif5_qvE)
@ -1193,32 +1193,32 @@ Graphs can be used to represent many problems in computer science, so this secti
    - [ ] Twitter:
        - [O'Reilly MySQL CE 2011: Jeremy Cole, "Big and Small Data at @Twitter" (video)](https://www.youtube.com/watch?v=5cKTP36HVgI)
        - [Timelines at Scale](https://www.infoq.com/presentations/Twitter-Timeline-Scalability)
-    - For even more, see "Mining Massive Datasets" video series in the [Video Series](#video-series) section.
+    - For even more, see "Mining Massive Datasets" video series in the [Video Series](#video-series) section
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [The System Design Primer](https://github.com/donnemartin/system-design-primer)
    - [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Understand the problem and scope:
-            - define the use cases, with interviewer's help
+            - Define the use cases, with interviewer's help
-            - suggest additional features
+            - Suggest additional features
-            - remove items that interviewer deems out of scope
+            - Remove items that interviewer deems out of scope
-            - assume high availability is required, add as a use case
+            - Assume high availability is required, add as a use case
        2. Think about constraints:
-            - ask how many requests per month
+            - Ask how many requests per month
-            - ask how many requests per second (they may volunteer it or make you do the math)
+            - Ask how many requests per second (they may volunteer it or make you do the math)
-            - estimate reads vs. writes percentage
+            - Estimate reads vs. writes percentage
-            - keep 80/20 rule in mind when estimating
+            - Keep 80/20 rule in mind when estimating
-            - how much data written per second
+            - How much data written per second
-            - total storage required over 5 years
+            - Total storage required over 5 years
-            - how much data read per second
+            - How much data read per second
        3. Abstract design:
-            - layers (service, data, caching)
+            - Layers (service, data, caching)
-            - infrastructure: load balancing, messaging
+            - Infrastructure: load balancing, messaging
-            - rough overview of any key algorithm that drives the service
+            - Rough overview of any key algorithm that drives the service
-            - consider bottlenecks and determine solutions
+            - Consider bottlenecks and determine solutions
    - Exercises:
-        - [Design a CDN network: old article](http://repository.cmu.edu/cgi/viewcontent.cgi?article=2112&context=compsci)
+        - [Design a CDN network: old article](https://kilthub.cmu.edu/articles/Globally_distributed_content_delivery/6605972)
        - [Design a random unique ID generation system](https://blog.twitter.com/2010/announcing-snowflake)
        - [Design an online multiplayer card game](http://www.indieflashblog.com/how-to-create-an-asynchronous-multiplayer-game.html)
        - [Design a key-value database](http://www.slideshare.net/dvirsky/introduction-to-redis)
@ -1250,12 +1250,12 @@ Now that you know all the computer science topics above, it's time to practice a
 **Coding question practice is not about memorizing answers to programming problems.**
 Why you need to practice doing programming problems:
- problem recognition, and where the right data structures and algorithms fit in
+- Problem recognition, and where the right data structures and algorithms fit in
- gathering requirements for the problem
+- Gathering requirements for the problem
- talking your way through the problem like you will in the interview
+- Talking your way through the problem like you will in the interview
- coding on a whiteboard or paper, not a computer
+- Coding on a whiteboard or paper, not a computer
- coming up with time and space complexity for your solutions
+- Coming up with time and space complexity for your solutions
- testing your solutions
+- Testing your solutions
 There is a great intro for methodical, communicative problem solving in an interview. You'll get this from the programming
 interview books, too, but I found this outstanding:
@ -1263,7 +1263,7 @@ interview books, too, but I found this outstanding:
 No whiteboard at home? That makes sense. I'm a weirdo and have a big whiteboard. Instead of a whiteboard, pick up a
 large drawing pad from an art store. You can sit on the couch and practice. This is my "sofa whiteboard".
-I added the pen in the photo for scale. If you use a pen, you'll wish you could erase. Gets messy quick. I use a pencil 
+I added the pen in the photo for scale. If you use a pen, you'll wish you could erase. Gets messy quick. I use a pencil
 and eraser.
 ![my sofa whiteboard](https://d3j2pkmjtin6ou.cloudfront.net/art_board_sm_2.jpg)
@ -1296,16 +1296,16 @@ Take coding challenges every day, as many as you can.
 Coding Interview Question Videos:
 - [IDeserve (88 videos)](https://www.youtube.com/watch?v=NBcqBddFbZw&list=PLamzFoFxwoNjPfxzaWqs7cZGsPYy0x_gI)
 - [Tushar Roy (5 playlists)](https://www.youtube.com/user/tusharroy2525/playlists?shelf_id=2&view=50&sort=dd)
-    - Super for walkthroughs of problem solutions.
+    - Super for walkthroughs of problem solutions
 - [Nick White - LeetCode Solutions (187 Videos)](https://www.youtube.com/playlist?list=PLU_sdQYzUj2keVENTP0a5rdykRSgg9Wp-)
-    - Good explanations of solution and the code.
+    - Good explanations of solution and the code
-    - You can watch several in a short time.
+    - You can watch several in a short time
 - [FisherCoder - LeetCode Solutions](https://youtube.com/FisherCoder)
 Challenge sites:
 - [LeetCode](https://leetcode.com/)
-    - My favorite coding problem site. It's worth the subscription money for the 1-2 months you'll likely be preparing.
+    - My favorite coding problem site. It's worth the subscription money for the 1-2 months you'll likely be preparing
-    - [LeetCode solutions from FisherCoder](https://github.com/fishercoder1534/Leetcode) 
+    - [LeetCode solutions from FisherCoder](https://github.com/fishercoder1534/Leetcode)
    - See Nick White Videos above for short code-throughs
 - [HackerRank](https://www.hackerrank.com/)
 - [TopCoder](https://www.topcoder.com/)
@ -1313,6 +1313,7 @@ Challenge sites:
 - [Geeks for Geeks](http://www.geeksforgeeks.org/)
 - [InterviewBit](https://www.interviewbit.com/invite/icjf)
 - [Project Euler (math-focused)](https://projecteuler.net/index.php?section=problems)
 - [Code Exercises](https://code-exercises.com)
 Language-learning sites, with challenges:
 - [Codewars](http://www.codewars.com)
@ -1325,9 +1326,10 @@ Challenge repos:
 - [Interactive Coding Interview Challenges in Python](https://github.com/donnemartin/interactive-coding-challenges)
 Mock Interviews:
- [Gainlo.co: Mock interviewers from big companies](http://www.gainlo.co/) - I used this and it helped me relax for the phone screen and on-site interview.
+- [Gainlo.co: Mock interviewers from big companies](http://www.gainlo.co/) - I used this and it helped me relax for the phone screen and on-site interview
 - [Pramp: Mock interviews from/with peers](https://www.pramp.com/) - peer-to-peer model of practice interviews
- [Refdash: Mock interviews and expedited interviews](https://refdash.com/) - also help candidates fast track by skipping multiple interviews with tech companies.
+- [Refdash: Mock interviews and expedited interviews](https://refdash.com/) - also help candidates fast track by skipping multiple interviews with tech companies
 - [interviewing.io: Practice mock interview with senior engineers](https://interviewing.io) - anonymous algorithmic/systems design interviews with senior engineers from FAANG anonymously.
 ## Once you're closer to the interview
@ -1350,7 +1352,7 @@ Have a story, not just data, about something you accomplished.
 - What's a tough problem you've solved?
 - Biggest challenges faced?
 - Best/worst designs seen?
- Ideas for improving an existing product.
+- Ideas for improving an existing product
 - How do you work best, as an individual and as part of a team?
 - Which of your skills or experiences would be assets in the role and why?
 - What did you most enjoy at [job x / project y]?
@ -1401,40 +1403,40 @@ You're never really done.
    These are here so you can dive into a topic you find interesting.
 - [The Unix Programming Environment](https://www.amazon.com/dp/013937681X)
-    - an oldie but a goodie
+    - An oldie but a goodie
 - [The Linux Command Line: A Complete Introduction](https://www.amazon.com/dp/1593273894/)
-    - a modern option
+    - A modern option
 - [TCP/IP Illustrated Series](https://en.wikipedia.org/wiki/TCP/IP_Illustrated)
 - [Head First Design Patterns](https://www.amazon.com/gp/product/0596007124/)
-    - a gentle introduction to design patterns
+    - A gentle introduction to design patterns
 - [Design Patterns: Elements of Reusable Object-Oriented Software](https://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
-    - aka the "Gang Of Four" book, or GOF
+    - AKA the "Gang Of Four" book, or GOF
-    - the canonical design patterns book
+    - The canonical design patterns book
 - [UNIX and Linux System Administration Handbook, 5th Edition](https://www.amazon.com/UNIX-Linux-System-Administration-Handbook/dp/0134277554/)
 - [Algorithm Design Manual](http://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/dp/1849967202) (Skiena)
    - As a review and problem recognition
-    - The algorithm catalog portion is well beyond the scope of difficulty you'll get in an interview.
+    - The algorithm catalog portion is well beyond the scope of difficulty you'll get in an interview
    - This book has 2 parts:
-        - class textbook on data structures and algorithms
+        - Class textbook on data structures and algorithms
-            - pros:
+            - Pros:
-                - is a good review as any algorithms textbook would be
+                - Is a good review as any algorithms textbook would be
-                - nice stories from his experiences solving problems in industry and academia
+                - Nice stories from his experiences solving problems in industry and academia
-                - code examples in C
+                - Code examples in C
-            - cons:
+            - Cons:
-                - can be as dense or impenetrable as CLRS, and in some cases, CLRS may be a better alternative for some subjects
+                - Can be as dense or impenetrable as CLRS, and in some cases, CLRS may be a better alternative for some subjects
-                - chapters 7, 8, 9 can be painful to try to follow, as some items are not explained well or require more brain than I have
+                - Chapters 7, 8, 9 can be painful to try to follow, as some items are not explained well or require more brain than I have
-                - don't get me wrong: I like Skiena, his teaching style, and mannerisms, but I may not be Stony Brook material.
+                - Don't get me wrong: I like Skiena, his teaching style, and mannerisms, but I may not be Stony Brook material
-        - algorithm catalog:
+        - Algorithm catalog:
-            - this is the real reason you buy this book.
+            - This is the real reason you buy this book
-            - about to get to this part. Will update here once I've made my way through it.
+            - About to get to this part. Will update here once I've made my way through it
    - Can rent it on kindle
    - Answers:
        - [Solutions](http://www.algorithm.cs.sunysb.edu/algowiki/index.php/The_Algorithms_Design_Manual_(Second_Edition))
        - [Solutions](http://blog.panictank.net/category/algorithmndesignmanualsolutions/page/2/)
    - [Errata](http://www3.cs.stonybrook.edu/~skiena/algorist/book/errata)
 - [Write Great Code: Volume 1: Understanding the Machine](https://www.amazon.com/Write-Great-Code-Understanding-Machine/dp/1593270038)
-    - The book was published in 2004, and is somewhat outdated, but it's a terrific resource for understanding a computer in brief.
+    - The book was published in 2004, and is somewhat outdated, but it's a terrific resource for understanding a computer in brief
-    - The author invented [HLA](https://en.wikipedia.org/wiki/High_Level_Assembly), so take mentions and examples in HLA with a grain of salt. Not widely used, but decent examples of what assembly looks like.
+    - The author invented [HLA](https://en.wikipedia.org/wiki/High_Level_Assembly), so take mentions and examples in HLA with a grain of salt. Not widely used, but decent examples of what assembly looks like
    - These chapters are worth the read to give you a nice foundation:
        - Chapter 2 - Numeric Representation
        - Chapter 3 - Binary Arithmetic and Bit Operations
@ -1446,19 +1448,19 @@ You're never really done.
        - Chapter 10 - Instruction Set Architecture
        - Chapter 11 - Memory Architecture and Organization
 - [Introduction to Algorithms](https://www.amazon.com/Introduction-Algorithms-3rd-MIT-Press/dp/0262033844)
-    - **Important:** Reading this book will only have limited value. This book is a great review of algorithms and data structures, but won't teach you how to write good code. You have to be able to code a decent solution efficiently.
+    - **Important:** Reading this book will only have limited value. This book is a great review of algorithms and data structures, but won't teach you how to write good code. You have to be able to code a decent solution efficiently
-    - aka CLR, sometimes CLRS, because Stein was late to the game
+    - AKA CLR, sometimes CLRS, because Stein was late to the game
 - [Computer Architecture, Sixth Edition: A Quantitative Approach](https://www.amazon.com/dp/0128119055)
    - For a richer, more up-to-date (2017), but longer treatment
 - [Programming Pearls](http://www.amazon.com/Programming-Pearls-2nd-Jon-Bentley/dp/0201657880)
    - The first couple of chapters present clever solutions to programming problems (some very old using data tape) but
-      that is just an intro. This a guidebook on program design and architecture.
+      that is just an intro. This a guidebook on program design and architecture
 ## Additional Learning
-    
+
-    I added them to help you become a well-rounded software engineer, and to be aware of certain 
+    I added them to help you become a well-rounded software engineer, and to be aware of certain
    technologies and algorithms, so you'll have a bigger toolbox.
 - ### Compilers
@ -1504,11 +1506,11 @@ You're never really done.
 - ### Information theory (videos)
    - [Khan Academy](https://www.khanacademy.org/computing/computer-science/informationtheory)
-    - more about Markov processes:
+    - More about Markov processes:
        - [Core Markov Text Generation](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/waxgx/core-markov-text-generation)
        - [Core Implementing Markov Text Generation](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/gZhiC/core-implementing-markov-text-generation)
        - [Project = Markov Text Generation Walk Through](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/EUjrq/project-markov-text-generation-walk-through)
-    - See more in MIT 6.050J Information and Entropy series below.
+    - See more in MIT 6.050J Information and Entropy series below
 - ### Parity & Hamming Code (videos)
    - [Intro](https://www.youtube.com/watch?v=q-3BctoUpHE)
@ -1519,19 +1521,19 @@ You're never really done.
    - [Error Checking](https://www.youtube.com/watch?v=wbH2VxzmoZk)
 - ### Entropy
-    - also see videos below
+    - Also see videos below
-    - make sure to watch information theory videos first
+    - Make sure to watch information theory videos first
    - [Information Theory, Claude Shannon, Entropy, Redundancy, Data Compression & Bits (video)](https://youtu.be/JnJq3Py0dyM?t=176)
 - ### Cryptography
-    - also see videos below
+    - Also see videos below
-    - make sure to watch information theory videos first
+    - Make sure to watch information theory videos first
    - [Khan Academy Series](https://www.khanacademy.org/computing/computer-science/cryptography)
    - [Cryptography: Hash Functions](https://www.youtube.com/watch?v=KqqOXndnvic&list=PLUl4u3cNGP6317WaSNfmCvGym2ucw3oGp&index=30)
    - [Cryptography: Encryption](https://www.youtube.com/watch?v=9TNI2wHmaeI&index=31&list=PLUl4u3cNGP6317WaSNfmCvGym2ucw3oGp)
 - ### Compression
-    - make sure to watch information theory videos first
+    - Make sure to watch information theory videos first
    - Computerphile (videos):
        - [Compression](https://www.youtube.com/watch?v=Lto-ajuqW3w)
        - [Entropy in Compression](https://www.youtube.com/watch?v=M5c_RFKVkko)
@ -1611,8 +1613,8 @@ You're never really done.
    - [How To Count A Billion Distinct Objects Using Only 1.5KB Of Memory](http://highscalability.com/blog/2012/4/5/big-data-counting-how-to-count-a-billion-distinct-objects-us.html)
 - ### Locality-Sensitive Hashing
-    - used to determine the similarity of documents
+    - Used to determine the similarity of documents
-    - the opposite of MD5 or SHA which are used to determine if 2 documents/strings are exactly the same.
+    - The opposite of MD5 or SHA which are used to determine if 2 documents/strings are exactly the same
    - [Simhashing (hopefully) made simple](http://ferd.ca/simhashing-hopefully-made-simple.html)
 - ### van Emde Boas Trees
@ -1629,11 +1631,11 @@ You're never really done.
        to move any accessed key to the root." - Skiena
    - Of these, I chose to implement a splay tree. From what I've read, you won't implement a
        balanced search tree in your interview. But I wanted exposure to coding one up
-        and let's face it, splay trees are the bee's knees. I did read a lot of red-black tree code.
+        and let's face it, splay trees are the bee's knees. I did read a lot of red-black tree code
-        - splay tree: insert, search, delete functions
+        - Splay tree: insert, search, delete functions
        If you end up implementing red/black tree try just these:
-        - search and insertion functions, skipping delete
+        - Search and insertion functions, skipping delete
-    - I want to learn more about B-Tree since it's used so widely with very large data sets.
+    - I want to learn more about B-Tree since it's used so widely with very large data sets
    - [Self-balancing binary search tree](https://en.wikipedia.org/wiki/Self-balancing_binary_search_tree)
    - **AVL trees**
@ -1642,7 +1644,7 @@ You're never really done.
            The AVL tree is another structure supporting O(log n) search, insertion, and removal. It is more rigidly
            balanced than red–black trees, leading to slower insertion and removal but faster retrieval. This makes it
            attractive for data structures that may be built once and loaded without reconstruction, such as language
-            dictionaries (or program dictionaries, such as the opcodes of an assembler or interpreter).
+            dictionaries (or program dictionaries, such as the opcodes of an assembler or interpreter)
        - [MIT AVL Trees / AVL Sort (video)](https://www.youtube.com/watch?v=FNeL18KsWPc&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&index=6)
        - [AVL Trees (video)](https://www.coursera.org/learn/data-structures/lecture/Qq5E0/avl-trees)
        - [AVL Tree Implementation (video)](https://www.coursera.org/learn/data-structures/lecture/PKEBC/avl-tree-implementation)
@ -1652,14 +1654,14 @@ You're never really done.
        - In practice:
            Splay trees are typically used in the implementation of caches, memory allocators, routers, garbage collectors,
            data compression, ropes (replacement of string used for long text strings), in Windows NT (in the virtual memory,
-            networking and file system code) etc.
+            networking and file system code) etc
        - [CS 61B: Splay Trees (video)](https://archive.org/details/ucberkeley_webcast_G5QIXywcJlY)
        - MIT Lecture: Splay Trees:
            - Gets very mathy, but watch the last 10 minutes for sure.
            - [Video](https://www.youtube.com/watch?v=QnPl_Y6EqMo)
    - **Red/black trees**
-        - these are a translation of a 2-3 tree (see below)
+        - These are a translation of a 2-3 tree (see below).
        - In practice:
            Red–black trees offer worst-case guarantees for insertion time, deletion time, and search time.
            Not only does this make them valuable in time-sensitive applications such as real-time applications,
@ -1667,7 +1669,7 @@ You're never really done.
            for example, many data structures used in computational geometry can be based on red–black trees, and
            the Completely Fair Scheduler used in current Linux kernels uses red–black trees. In the version 8 of Java,
            the Collection HashMap has been modified such that instead of using a LinkedList to store identical elements with poor
-            hashcodes, a Red-Black tree is used.
+            hashcodes, a Red-Black tree is used
        - [Aduni - Algorithms - Lecture 4 (link jumps to starting point) (video)](https://youtu.be/1W3x0f_RmUo?list=PLFDnELG9dpVxQCxuD-9BSy2E7BWY3t5Sm&t=3871)
        - [Aduni - Algorithms - Lecture 5 (video)](https://www.youtube.com/watch?v=hm2GHwyKF1o&list=PLFDnELG9dpVxQCxuD-9BSy2E7BWY3t5Sm&index=5)
        - [Red-Black Tree](https://en.wikipedia.org/wiki/Red%E2%80%93black_tree)
@ -1698,12 +1700,12 @@ You're never really done.
        - [K-Ary Tree](https://en.wikipedia.org/wiki/K-ary_tree)
    - **B-Trees**
-        - fun fact: it's a mystery, but the B could stand for Boeing, Balanced, or Bayer (co-inventor)
+        - Fun fact: it's a mystery, but the B could stand for Boeing, Balanced, or Bayer (co-inventor).
        - In Practice:
            B-Trees are widely used in databases. Most modern filesystems use B-trees (or Variants). In addition to
            its use in databases, the B-tree is also used in filesystems to allow quick random access to an arbitrary
            block in a particular file. The basic problem is turning the file block i address into a disk block
-            (or perhaps to a cylinder-head-sector) address.
+            (or perhaps to a cylinder-head-sector) address
        - [B-Tree](https://en.wikipedia.org/wiki/B-tree)
        - [B-Tree Datastructure](http://btechsmartclass.com/data_structures/b-trees.html)
        - [Introduction to B-Trees (video)](https://www.youtube.com/watch?v=I22wEC1tTGo&list=PLA5Lqm4uh9Bbq-E0ZnqTIa8LRaL77ica6&index=6)
@ -1715,8 +1717,8 @@ You're never really done.
 - ### k-D Trees
-    - great for finding number of points in a rectangle or higher dimension object
+    - Great for finding number of points in a rectangle or higher dimension object
-    - a good fit for k-nearest neighbors
+    - A good fit for k-nearest neighbors
    - [Kd Trees (video)](https://www.youtube.com/watch?v=W94M9D_yXKk)
    - [kNN K-d tree algorithm (video)](https://www.youtube.com/watch?v=Y4ZgLlDfKDg)
@ -1756,7 +1758,7 @@ You're never really done.
    - [Divide & Conquer: Convex Hull, Median Finding](https://www.youtube.com/watch?v=EzeYI7p9MjU&list=PLUl4u3cNGP6317WaSNfmCvGym2ucw3oGp&index=2)
 - ### Discrete math
-    - see videos below
+    - See videos below
 - ### Machine Learning
    - Why ML?
@ -1942,6 +1944,11 @@ Sit back and enjoy. "Netflix and skill" :P
 - [Directory of Online CS Courses](https://github.com/open-source-society/computer-science)
 - [Directory of CS Courses (many with online lectures)](https://github.com/prakhar1989/awesome-courses)
 ## Algorithms implementation
 - [Multiple Algorithms implementation by Princeton University)](https://algs4.cs.princeton.edu/code)
 ## Papers
 - [Love classic papers?](https://www.cs.cmu.edu/~crary/819-f09/)
--- a/Essentials.pdf
+++ b/Essentials.pdf
--- a/programming-language-resources.md
+++ b/programming-language-resources.md
@ -1,7 +1,7 @@
 ## Programming Language Resources
 - C
-    - [ANSI C Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/C%20Reference%20Card%20(ANSI)%202.2.pdf)
+    - [ANSI C Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/C%20Reference%20Card%20(ANSI)%202.2.pdf)
    - K&R C book (ANSI C)
    - [Make, Clang (video)](https://www.youtube.com/watch?v=U3zCxnj2w8M)
    - GDB:
@ -10,18 +10,19 @@
        - [Valgrind (video)](https://www.youtube.com/watch?v=fvTsFjDuag8)
    - [Let us C](https://books.google.co.in/books/about/Let_Us_C.html?id=7HrjAAAACAAJ)
 - C++
-    - [C++ Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/Cpp_reference.pdf)
+    - [C++ Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/Cpp_reference.pdf)
-    - [STL Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/STL%20Quick%20Reference%201.29.pdf)
+    - [STL Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/STL%20Quick%20Reference%201.29.pdf)
-    - basics
+    - [basics](https://www.tutorialspoint.com/cplusplus/cpp_basic_syntax.htm)
-    - pointers
+    - [pointers](https://www.cprogramming.com/tutorial/lesson6.html)
-    - functions
+    - [class and object](https://www.cprogramming.com/tutorial/lesson12.html)
-    - references
+    - [functions](https://www.cprogramming.com/tutorial/lesson4.html)
-    - templates
+    - [references](https://www.geeksforgeeks.org/references-in-c/)
-    - compilation
+    - [templates](https://www.cprogramming.com/tutorial/templates.html)
-    - scope & linkage
+    - [compilation](https://www.youtube.com/watch?v=ZTu0kf-7h08)
-    - namespaces
+    - [scope & linkage](https://www.learncpp.com/cpp-tutorial/scope-duration-and-linkage-summary/)
-    - OOP
+    - [namespaces](https://www.tutorialspoint.com/cplusplus/cpp_namespaces.htm)
-    - STL
+    - [OOP](https://www.geeksforgeeks.org/object-oriented-programming-in-cpp/)
    - [STL](https://www.hackerearth.com/practice/notes/standard-template-library/)
    - [functors](http://www.cprogramming.com/tutorial/functors-function-objects-in-c++.html)
    - [C++ at Google (video)](https://www.youtube.com/watch?v=NOCElcMcFik)
    - [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html)
@ -31,7 +32,7 @@
    - [Let us C++](https://books.google.co.in/books/about/Let_Us_C++.html?id=6HrjAAAACAAJ)
    - [C++ Primer](https://books.google.co.in/books/about/C++_Primer.html?id=J1HMLyxqJfgC&redir_esc=y)
 - Python
-    - [Python Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/python-cheat-sheet-v1.pdf)
+    - [Python Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/python-cheat-sheet-v1.pdf)
    - [Python in One Video](https://www.youtube.com/watch?v=N4mEzFDjqtA)
    - [Series on 3.4 (video)](https://www.youtube.com/playlist?list=PL6gx4Cwl9DGAcbMi1sH6oAMk4JHw91mC_)
    - [Statistics for Hackers (video)](https://www.youtube.com/watch?v=Iq9DzN6mvYA)
@ -40,12 +41,15 @@
    - [10 Tips for Pythonic Code (video)](https://www.youtube.com/watch?v=_O23jIXsshs)
    - [Beyond PEP 8 -- Best practices for beautiful intelligible code (video)](https://www.youtube.com/watch?v=wf-BqAjZb8M)
    - [Automate the Boring Stuff with Python](https://automatetheboringstuff.com/)
    - [Coding Interview Essentials](https://github.com/ajinkyal121/coding-interview-university/blob/master/extras/cheat%20sheets/Coding%20Interview%20Python%20Language%20Essentials.pdf)
    - [Data Structures And Algorithms in Python](https://www.youtube.com/watch?v=kQDxmjfkIKY)
 - Java
    - [Stanford CS106A - Programming Methodology (video)](https://see.stanford.edu/Course/CS106A)
    - [Software Construction In Java (video)](https://www.edx.org/course/software-construction-java-mitx-6-005-1x)
    - [Introduction To Programming In Java](http://introcs.cs.princeton.edu/java/home/)
    - [Algorithms 4th Ed - Algorithm Book In Java](http://algs4.cs.princeton.edu/home/)
    - [Effective Java 3rd Edition](https://www.amazon.com/Effective-Java-Joshua-Bloch-ebook/dp/B078H61SCH)
    - [Data Structures Easy to Advanced Course - Full Tutorial from a Google Engineer](https://www.youtube.com/watch?v=RBSGKlAvoiM&t=1744s)
 - Go
    - [The Go programming Language](https://golang.org/)
    - [The Go programming Language (book)](http://www.gopl.io/)
@ -58,12 +62,16 @@
 - HTML
    - [Quick HTML Tutorial for Beginners](https://www.youtube.com/playlist?list=PLr6-GrHUlVf_ZNmuQSXdS197Oyr1L9sPB)
    - [HTML Crash Course for Beginners (1 hr)](https://www.youtube.com/watch?v=UB1O30fR-EE)
    - [Basic HTML and HTML5](https://www.freecodecamp.org/learn/responsive-web-design/basic-html-and-html5/)
 - CSS
    - [Quick CSS Tutorial for Beginners](https://www.youtube.com/playlist?list=PLr6-GrHUlVf8JIgLcu3sHigvQjTw_aC9C)
    - [CSS Crash Course for absolute Beginners](https://www.youtube.com/watch?v=yfoY53QXEnI)
    - [Basic CSS](https://www.freecodecamp.org/learn/responsive-web-design/basic-css/)
 - Javascript
    - [Learn Javascript in 12 minutes](https://www.youtube.com/watch?v=Ukg_U3CnJWI)
    - [Javascript Beginner Tutorials](https://www.youtube.com/playlist?list=PL41lfR-6DnOrwYi5d824q9-Y6z3JdSgQa)
    - [Javascript Algorithms and Data Structures](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-javascript/)
    - [Javascript Algorithms With Explanations](https://github.com/trekhleb/javascript-algorithms)
 - Other Language 1
 - Other Language 2
 - etc
--- a/translations/README-ar.md
+++ b/translations/README-ar.md
@ -1,37 +1,60 @@
-# الإعداد لجوجل
+# الإعداد لمقابلة البرمجة
-الترجمه:
+> أنشأتها في المقام الأول كلائحة قصيرة من المواضيع الدراسية لكيف يصبح المرء مهندس برمجيات، ولكن سرعان ما كبرت هذه القائمة إلى ما تراه أمامك اليوم. بعد خوض هذه الخطة الدراسية, 
- [中文版本](README-cn.md)
+[تم توظيفي كمهندس تطوير  برمجيات لدى أمازون](https://startupnextdoor.com/ive-been-acquired-by-amazon/?src=ciu)! على الأغلب لن تحتاج إلى ان تدرس بالقدر الذي درسته أنا. لكن على كل حال كل ما تحتاج إليه موجود 
- الترجمات تحت الاعداد:
+هنا
-    - [Español](https://github.com/jwasham/coding-interview-university/issues/80)
+> 
-    - [हिन्दी](https://github.com/jwasham/coding-interview-university/issues/81)
+> درست لمدة ٨-١٢ ساعة في اليوم, لعدة أشهر. هذه هي قصتي: [لماذا درست دواما كاملا لمدة ثمانية أشهر من أجل مقابلة لدا قوقل](https://medium.freecodecamp.org/why-i-studied-full-time-for-8-months-for-a-google-interview-cc662ce9bb13)
-    - [עברית](https://github.com/jwasham/coding-interview-university/issues/82)
+> 
-    - [Bahasa Indonesia](https://github.com/jwasham/coding-interview-university/issues/101)
+> العناصر المذكورة في هذه اللائحة ستجهزك جيدا لمقابلة تقنية مع تقريبا أي شركة برمجية, حتى الشركات العملاقة: أمازون، فيسبوك، قوقل، وميكروسوفت
-    - [Arabic](https://github.com/jwasham/coding-interview-university/issues/98)
+> 
-    - [Vietnamese](https://github.com/jwasham/coding-interview-university/issues/92)
+> بالتوفيق
    - [Turkish](https://github.com/jwasham/coding-interview-university/issues/90)
    - [French](https://github.com/jwasham/coding-interview-university/issues/89)
    - [Russian](https://github.com/jwasham/coding-interview-university/issues/87)
    - [Ukrainian](https://github.com/jwasham/coding-interview-university/issues/106)
    - [Brazilian Portuguese](https://github.com/jwasham/coding-interview-university/issues/113)
    - [Korean](https://github.com/jwasham/coding-interview-university/issues/118)
    - [Polish](https://github.com/jwasham/coding-interview-university/issues/122)
-## ماهذا؟
+<details>
-هي خطة من عدة أشهر من مطور تطبيقات ويب (قائمة على التعليم الذاتي، ومبدون درجة علمية في علوم الحاسب) لمنصب مهندس برمجيات بجوجل
+<summary>الترجمات:</summary>
 - [中文版本](translations/README-cn.md)
 - [Tiếng Việt - الفيتنامبة](translations/README-vi.md)
 - [الإسبانية](translations/README-es.md)
 - [(البرتغالية (البرازيلية](translations/README-ptbr.md)
 - [البولندية](translations/README-pl.md)
 - [繁體中文](translations/README-tw.md)
 - [اليابانية (日本語)](translations/README-ja.md)
 - [الروسية](translations/README-ru.md)
 </details>
 <details>
 <summary>ترجمات تحت الإعداد:</summary>
 - [हिन्दी](https://github.com/jwasham/coding-interview-university/issues/81)
 - [עברית](https://github.com/jwasham/coding-interview-university/issues/82)
 - [الإندونيسية](https://github.com/jwasham/coding-interview-university/issues/101)
 - [العربية](https://github.com/jwasham/coding-interview-university/issues/98)
 - [التركية](https://github.com/jwasham/coding-interview-university/issues/90)
 - [الفرنسية](https://github.com/jwasham/coding-interview-university/issues/89)
 - [الأكرانية](https://github.com/jwasham/coding-interview-university/issues/106)
 - [الكورية(한국어)](https://github.com/jwasham/coding-interview-university/issues/118)
 - [Telugu](https://github.com/jwasham/coding-interview-university/issues/117)
 - [أردو](https://github.com/jwasham/coding-interview-university/issues/140)
 - [التايلندية](https://github.com/jwasham/coding-interview-university/issues/156)
 - [اليونانية](https://github.com/jwasham/coding-interview-university/issues/166)
 - [الإيطالية](https://github.com/jwasham/coding-interview-university/issues/170)
 - [Malayalam](https://github.com/jwasham/coding-interview-university/issues/239)
 </details>
 ## ما هذا؟
 هي خطتي متعددة الأشهر للوصول من مطور ويب (تعليم ذاتي، بدون درجة علمية في علوم الحاسب) لمنصب مهندس برمجيات لشركة عملاقة
-![HBO كتابة الكود علي السبورة - من وادي السيليكون](https://d3j2pkmjtin6ou.cloudfront.net/coding-at-the-whiteboard-silicon-valley.png)
+![Coding at the whiteboard - from HBO's Silicon Valley](https://d3j2pkmjtin6ou.cloudfront.net/coding-at-the-whiteboard-silicon-valley.png)
-هذه القائمة الطويلة تم إعدادها من ملاحظات الإعداد لجوجل، لذلك هي الأشياء مطالب بمعرفتها.
+تم إعدادها لمهنسي البرمجيات الجدد أو أولئك المنتقلين من تطوير الويب إلى هندسة البرمجيات (حيث المعرفة بعلوم الحاسب ضرورية) إذا كان لديك العديد من سنوات الخبرة في بناء تطبيقات الويب أو البرمجيات، خذ في عين الإعتبار ان المقابلة ستكون اصعب
 هناك أشياء إضافية أضفتها في آخر القائمة التي ربما تأتي في المقابلة الشخصية أو تساعد في حل المشاكل البرمجية. كتيرا من العناصر من: كتاب ستيف ياج "[احصل على وظيفة بجوجل](http://steve-yegge.blogspot.com/2008/03/get-that-job-at-google.html)" ومن حين لآخر ملاحظات الإعداد لجوجل.
 لقد قلصت ماستحتاجه من ملاحظات ياج. وقمت بتعديل متطلبات ياج.
 من معلومات تم الحصول عليها من معارفي بجوجل. هذا يعني أنه من **من مهندسين برمجيات جدد** أو من الذين غيروا مسار العمل من تطوير الويب والبرمجيات إلى مهندس برمجيات(حيث علوم الحساب أمر أساسي). لو لديك كتير من سنوات الخبرة في هندسة البرمجيات توقع المقابلة الشخصية الأصعب.
 [اقرأ المزيد](https://googleyasheck.com/what-you-need-to-know-for-your-google-interview-and-what-you-dont/).
-إذا كان لديك العديد من سنوات الخبرة في بناء تطبيقات الويب أو البرمجيات، لاحظ أن رؤية جوجل لهندسة البرمجيات تختلف عن منظور تطوير التطبيقات أو البرمجيات وتطلب معرفة بعلوم الحاسب.
+إذا كانت لديك العديد من سنوات الخبرة في تطوير الويب, خذ في عين الإعتبار أن الشركات االبرمجية الضخمة مثل قوقل, فيسبوك, و ميكروسوفت ينظرون إلى هندسة البرمجيات بشكل مختلف عن تطوير البرمجيات/ويب, و تحتاج إلى معرفة علوم الحاسب
-أذا كنت تريد أن تصبح مهندس أنظمة أو مهندس ++، اقرأ المزيد من القائمة الاختيارية عن(شبكات الحاسب، والحماية).
+إذا اردت ان تصبح مهندس موثوقية أو مهندس عمليات, ادرس اكثر من القائمة الإختيارية (شبكات, امن)
 ---
@ -48,11 +71,11 @@
 - [عن مصادر الفديو](#about-video-resources)
 - [مراحل المقابلة الشخصية & الإستعداد العام للمقابلة](#interview-process--general-interview-prep)
 - [اختر لغة برمجية واحدة للمقابلة البرمجية](#pick-one-language-for-the-interview)
- [Book List](#book-list)
+- [لائحة الكتب](#book-list)
- [Before you Get Started](#before-you-get-started)
+- [قبل أن تبدأ](#before-you-get-started)
- [What you Won't See Covered](#what-you-wont-see-covered)
+- [ما لن تجده هنا](#what-you-wont-see-covered)
- [Prerequisite Knowledge](#prerequisite-knowledge)
+- [معرفة مسبقة](#prerequisite-knowledge)
- [The Daily Plan](#the-daily-plan)
+- [الخطة اليومية](#the-daily-plan)
 - [Algorithmic complexity / Big-O / Asymptotic analysis](#algorithmic-complexity--big-o--asymptotic-analysis)
 - [Data Structures](#data-structures)
    - [Arrays](#arrays)
@ -189,7 +212,7 @@
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -197,9 +220,9 @@
 ## الدخول في مزاج جوجلي
-Print out a "[future Googler](https://github.com/jwasham/coding-interview-university/blob/master/extras/future-googler.pdf)" sign (or two) and keep your eyes on the prize.
+Print out a "[future Googler](https://github.com/jwasham/coding-interview-university/blob/main/extras/future-googler.pdf)" sign (or two) and keep your eyes on the prize.
-[![future Googler sign](https://dng5l3qzreal6.cloudfront.net/2016/Oct/Screen_Shot_2016_10_04_at_10_13_24_AM-1475601104364.png)](https://github.com/jwasham/coding-interview-university/blob/master/extras/future-googler.pdf)
+[![future Googler sign](https://dng5l3qzreal6.cloudfront.net/2016/Oct/Screen_Shot_2016_10_04_at_10_13_24_AM-1475601104364.png)](https://github.com/jwasham/coding-interview-university/blob/main/extras/future-googler.pdf)
 ## هل حصلت على الوظيفة بجوجل؟
@ -480,8 +503,8 @@ OR:
 اصنع واحدا منها لك مجانا:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required by Google.
@ -717,7 +740,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -746,7 +769,6 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 ## Trees
 - ### Trees - Notes & Background
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
@ -1292,7 +1314,7 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
    - For even more, see "Mining Massive Datasets" video series in the Video Series section.
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Understand the problem and scope:
            - define the use cases, with interviewer's help
--- a/translations/README-bn.md
+++ b/translations/README-bn.md
--- a/translations/README-cn.md
+++ b/translations/README-cn.md
--- a/translations/README-de.md
+++ b/translations/README-de.md
@ -225,7 +225,7 @@ Ich benutze GitHub's spezielle Version von Markdown, das beinhält Aufgabenliste
 `git commit -m "Marked x"`
-`git rebase jwasham/master`
+`git rebase jwasham/main`
 `git push --force`
@ -433,8 +433,8 @@ Ich habe eine mobile-first Webseite gemacht, damit ich auf meinen Smartphone ode
 Erstell kostenlos deine eigenen Lernkarten:
 - [Lernkarten-Webseiten Repo](https://github.com/jwasham/computer-science-flash-cards)
- [Meine Lernkarten Databank (alt - 1200 Karten)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [Meine Lernkarten Databank (alt - 1200 Karten)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [Meine Lernkarten Databank (neu - 1800 Karten)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [Meine Lernkarten Databank (neu - 1800 Karten)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Achtung, ich habe es übertrieben und Lernkarten über alles erstellt, von Assembly und Python Trivia bis hin zu Machine Learning und Statistik. Das ist viel mehr als eigentlich notwendig.
@ -693,7 +693,7 @@ Schreib Code auf einer Tafel oder auf Papier, aber nicht am Computer. Teste mit
        - Binärsuche mittels Rekursion
 - ### Bitweise Operationen
-    - [ ] [Bits Spickzettel](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - man sollte viele der Zweierpotenzen kennen (von 2^1 über 2^16 und 2^32)
+    - [ ] [Bits Spickzettel](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - man sollte viele der Zweierpotenzen kennen (von 2^1 über 2^16 und 2^32)
    - [ ] Erhalte sehr gutes Verständnis Bits zu manipulieren mit: &, |, ^, ~, >>, <<
        - [ ] [Wörter](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Gute Einführung:
@ -727,7 +727,6 @@ Schreib Code auf einer Tafel oder auf Papier, aber nicht am Computer. Teste mit
 <summary>Trees (Bäume)</summary>
 - ### Trees - Notizen und Hintergrund
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - generell Baumerstellung
    - Traversieren (Durchlaufen)
@ -1309,7 +1308,7 @@ Graphen können genutzt werden, um damit viele verschiedene Probleme in der Info
 - [ ] Übe den Prozess des Systementwurfs: Hier sind ein paar Ideen, die man auf Papier durchspielen kann, jede mit einer Dokumentation wie es in der echten Welt umgesetzt wurde:
    - Review: [The System Design Primer](https://github.com/donnemartin/system-design-primer)
    - [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [Spickzettel](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [Spickzettel](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - Ablauf:
        1. Verstehe das Problem und den Umfang:
            - definiere den Anwendungsfall, was dem Interviewer helfen wird
--- a/translations/README-es.md
+++ b/translations/README-es.md
@ -1,6 +1,6 @@
 # Coding Interview University
- Versión original: [Inglés](README.md)
+- Versión original: [Inglés](../README.md)
 > Originalmente creé esto como una lista corta de tópicos a estudiar para volverse un Ingeniero de Software, pero creció hasta ser la gran lista puede apreciar actualmente. Después de pasar por este plan de estudios ¡[fui contratado como Ingeniero de Desarrollo de Software en Amazon!(Art. Inglés)](https://startupnextdoor.com/ive-been-acquired-by-amazon/?src=ciu)
@ -172,7 +172,7 @@ Si desea ser un Ingeniero de Escalabilidad/Seguridad o un Ingeniero de Sistemas,
 Cuando comencé este proyecto, no sabía la diferencia entre un stack y un heap, no conocía la notación Big-O, nada acerca de árboles, ni cómo sacar la transversal de una gráfica. Si tenía que programar un algoritmo de clasificación, puedo decir que no hubiera sido muy bueno. Cada estructura de datos que había utilizado estaba incorporada al lenguaje, y yo no sabía cómo funcionaban realmente. Yo nunca tuve que manejar la memoria a menos que un proceso que yo estaba corriendo diera un error de “out of memory”, y tenía que encontrar una alternativa. He usado pocos arreglos de varias dimensiones en mi vida y miles de arreglos asociativos, pero nunca he creado estructuras de datos desde cero.
-Pero después de pasar por todo este plan de estudios tengo mucha confianza de que seré contratado. Me toará meses. Si mucho de esto te resulta familiar entonces te tomará mucho menos tiempo.
+Pero después de pasar por todo este plan de estudios tengo mucha confianza de que seré contratado. Me tomará meses. Si mucho de esto te resulta familiar entonces te tomará mucho menos tiempo.
 Es un plan largo, puede tome unos meses; pero si le resulta familiar mucho de esto le tomara mucho menos tiempo.
@ -199,7 +199,7 @@ Estoy usando el tema especial de markdown de Github, incluyendo listas de tareas
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -406,8 +406,8 @@ Hice un sitio adaptado a moviles para revisarlo en mi celular y en mi Tablet, do
 Haga el suyo gratis:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Tenga en cuenta que empecé desde abajo y hay tarjetas que cubren todo, desde el lenguaje ensamblador y la trivia Python al Machine Learning y estadísticas. Es demasiado para lo que se requiere.
@ -415,7 +415,7 @@ Tenga en cuenta que empecé desde abajo y hay tarjetas que cubren todo, desde el
 Una alternativa a usar mi sitio de tarjetas es [Anki](http://ankisrs.net/), que me ha sido recomendado muchas veces. Usa un sistema de repetición para ayudarle a recordar. Es amigable con el usuario y disponible para todas las plataformas y tiene un sistema de sincronización en la nube. Cuesta $25 en iOS pero es gratuito en las otras plataformas.
-Mis tarjetas en ek formato de Anki: https://ankiweb.net/shared/info/25173560 (Gracias[@xiewenya](https://github.com/xiewenya))
+Mis tarjetas en el formato de Anki: https://ankiweb.net/shared/info/25173560 (Gracias[@xiewenya](https://github.com/xiewenya))
 ### 3. Revise, revise, revise
@ -636,7 +636,7 @@ Escriba código en un pizarrón o en papel no en la computadora. Pruebe con algu
        - Búsqueda binaria usando recursión
 - ### Operaciones bit a bit
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - Debería conocer varias de las potencias de 2 a partir de (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - Debería conocer varias de las potencias de 2 a partir de (2^1 to 2^16 and 2^32)
    - [ ] Obtenga un buen entendimiento de la manipulación de bits con: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Buena introducción:
@ -664,7 +664,6 @@ Escriba código en un pizarrón o en papel no en la computadora. Pruebe con algu
 ## Árboles
 - ### Árboles - Notas & Antecedentes
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - Construcción básica de árboles
    - Recorrido
@ -1255,7 +1254,7 @@ Obtendrá más práctica de grafos en el libro de Skiena (vea Sección de libros
 - [ ] Practicando el proceso de diseño del sistema: Aquí hay algunas ideas para tratar de trabajar en papel, cada una con cierta documentación sobre cómo se manejó en el mundo real:
    - Revisión: [The System Design Primer](https://github.com/donnemartin/system-design-primer)
    - [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - Flujo:
        1. Comprender el problema y el alcance:
            - Definir los casos de uso, con ayuda del entrevistador
--- a/translations/README-fr.md
+++ b/translations/README-fr.md
@ -1,6 +1,6 @@
 # Coding Interview University
-Translations:
+Traductions:
 - [中文版本](README-cn.md)
 - [Español (in progress)](README-es.md) [Issue #80](https://github.com/jwasham/coding-interview-university/issues/80)
 - मानक हिन्दी (in progress) [Issue #81](https://github.com/jwasham/coding-interview-university/issues/81)
@ -32,7 +32,7 @@ Si vous souhaitez devenir ingénieur de fiabilité, ou ingénieur systèmes, sui
 - [Se mettre dans l'humeur Googley](#get-in-a-googley-mood)
 - [J'ai décroché le Job?](#did-i-get-the-job)
 - [Follow Along with Me](#follow-along-with-me)
- [Don't feel you aren't smart enough](#dont-feel-you-arent-smart-enough)
+- [Ne vous sentez pas stupide](#ne-vous-sentez-pas-stupide)
 - [A propos de Google](#about-google)
 - [A propos des ressources vidéo](#about-video-resources)
 - [Déroulement de l'entretien & préparations générales à l'entretien](#interview-process--general-interview-prep)
@ -188,7 +188,7 @@ I'm using Github's special markdown flavor, including tasks lists to check progr
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -196,9 +196,9 @@ I'm using Github's special markdown flavor, including tasks lists to check progr
 ## Get in a Googley Mood
-Print out a "[future Googler](https://github.com/jwasham/coding-interview-university/blob/master/extras/future-googler.pdf)" sign (or two) and keep your eyes on the prize.
+Print out a "[future Googler](https://github.com/jwasham/coding-interview-university/blob/main/extras/future-googler.pdf)" sign (or two) and keep your eyes on the prize.
-[![future Googler sign](https://dng5l3qzreal6.cloudfront.net/2016/Oct/Screen_Shot_2016_10_04_at_10_13_24_AM-1475601104364.png)](https://github.com/jwasham/coding-interview-university/blob/master/extras/future-googler.pdf)
+[![future Googler sign](https://dng5l3qzreal6.cloudfront.net/2016/Oct/Screen_Shot_2016_10_04_at_10_13_24_AM-1475601104364.png)](https://github.com/jwasham/coding-interview-university/blob/main/extras/future-googler.pdf)
 ## Did I Get the Job?
@ -220,35 +220,35 @@ I'm on the journey, too. Follow along:
 ![John Washam - Coding Interview University](https://dng5l3qzreal6.cloudfront.net/2016/Aug/book_stack_photo_resized_18_1469302751157-1472661280368.png)
-## Don't feel you aren't smart enough
+## Ne vous sentez pas stupide
- Google engineers are smart, but many have an insecurity that they aren't smart enough, even though they work at Google.
+- Les ingénieurs de Google sont intelligents, mais beaucoup ont comme insécurité qu'ils ne sont pas suffisamment intelligents, même s'ils travaillent pour Google.
- [The myth of the Genius Programmer](https://www.youtube.com/watch?v=0SARbwvhupQ)
+- [Le mythe du programmeur génie](https://www.youtube.com/watch?v=0SARbwvhupQ)
- [It's Dangerous to Go Alone: Battling the Invisible Monsters in Tech](https://www.youtube.com/watch?v=1i8ylq4j_EY)
+- [C'est dangereux de rester seul: Combattre les monstres invisibles dans la Tech](https://www.youtube.com/watch?v=1i8ylq4j_EY)
-## About Google
+## À propos de Google
- [ ] For students - [Google Careers: Technical Development Guide](https://www.google.com/about/careers/students/guide-to-technical-development.html)
+- [ ] Pour les étudiants - [Carrières Google: Guide de développement technique](https://www.google.com/about/careers/students/guide-to-technical-development.html)
- [ ] How Search Works:
+- [ ] Comment marche la recherche:
-    - [ ] [The Evolution of Search (video)](https://www.youtube.com/watch?v=mTBShTwCnD4)
+    - [ ] [L'évolution de la recherche (video)](https://www.youtube.com/watch?v=mTBShTwCnD4)
-    - [ ] [How Search Works - the story](https://www.google.com/insidesearch/howsearchworks/thestory/)
+    - [ ] [Comment la recherche fonctionne - l'histoire](https://www.google.com/insidesearch/howsearchworks/thestory/)
-    - [ ] [How Search Works](https://www.google.com/insidesearch/howsearchworks/)
+    - [ ] [Comment la recherche fonctionne](https://www.google.com/insidesearch/howsearchworks/)
-    - [ ] [How Search Works - Matt Cutts (video)](https://www.youtube.com/watch?v=BNHR6IQJGZs)
+    - [ ] [Comment la recherche fonctionne - Matt Cutts (video)](https://www.youtube.com/watch?v=BNHR6IQJGZs)
-    - [ ] [How Google makes improvements to its search algorithm (video)](https://www.youtube.com/watch?v=J5RZOU6vK4Q)
+    - [ ] [Comment Google améliore son algorithme de recherche (video)](https://www.youtube.com/watch?v=J5RZOU6vK4Q)
- [ ] Series:
+- [ ] Séries:
-    - [ ] [How Google Search Dealt With Mobile](https://backchannel.com/how-google-search-dealt-with-mobile-33bc09852dc9)
+    - [ ] [Comment la recherche Google Search fonctionne sur mobile](https://backchannel.com/how-google-search-dealt-with-mobile-33bc09852dc9)
-    - [ ] [Google's Secret Study To Find Out Our Needs](https://backchannel.com/googles-secret-study-to-find-out-our-needs-eba8700263bf)
+    - [ ] [L'étude secrète de Google pour découvrir nos besoins](https://backchannel.com/googles-secret-study-to-find-out-our-needs-eba8700263bf)
-    - [ ] [Google Search Will Be Your Next Brain](https://backchannel.com/google-search-will-be-your-next-brain-5207c26e4523)
+    - [ ] [La recherche Google Search sera votre prochain cerveau](https://backchannel.com/google-search-will-be-your-next-brain-5207c26e4523)
-    - [ ] [The Deep Mind Of Demis Hassabis](https://backchannel.com/the-deep-mind-of-demis-hassabis-156112890d8a)
+    - [ ] [L'esprit profond de Demis Hassabis](https://backchannel.com/the-deep-mind-of-demis-hassabis-156112890d8a)
- [ ] [Book: How Google Works](https://www.amazon.com/How-Google-Works-Eric-Schmidt/dp/1455582344)
+- [ ] [Livre: Comment Google fonctionne](https://www.amazon.com/How-Google-Works-Eric-Schmidt/dp/1455582344)
- [ ] [Made by Google announcement - Oct 2016 (video)](https://www.youtube.com/watch?v=q4y0KOeXViI)
+- [ ] [Annonce faite par Google - Oct 2016 (video)](https://www.youtube.com/watch?v=q4y0KOeXViI)
-## About Video Resources
+## À propos des ressources vidéos
-Some videos are available only by enrolling in a Coursera, EdX, or Lynda.com class. These are called MOOCs.
+Certaines vidéos sont disponibles uniquement en s'inscrivant à une classe Coursera, EdX ou Lynda.com. Ce sont des MOOC.
-Sometimes the classes are not in session so you have to wait a couple of months, so you have no access. Lynda.com courses are not free.
+Parfois, les cours ne sont pas en session, alors vous devez attendre quelques mois, donc vous n'y avez pas accès. Les cours sur Lynda.com ne sont pas gratuits.
-    I'd appreciate your help to add free and always-available public sources, such as YouTube videos to accompany the online course videos.
+    J'apprécierais votre aide pour ajouter des sources publiques gratuites et toujours disponibles, telles que des vidéos YouTube pour accompagner les vidéos de cours en ligne.
-    I like using university lectures.
+    J'aime utiliser les cours universitaires.
 ## Interview Process & General Interview Prep
@ -469,7 +469,7 @@ I made a mobile-first website so I could review on my phone and tablet, wherever
 Make your own for free:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db): Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required by Google.
+- [My flash cards database](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db): Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required by Google.
 **Note on flashcards:** The first time you recognize you know the answer, don't mark it as known. You have to see the
 same card and answer it several times correctly before you really know it. Repetition will put that knowledge deeper in
@ -703,7 +703,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -732,7 +732,6 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 ## Trees
 - ### Trees - Notes & Background
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
@ -1248,7 +1247,7 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
    - For even more, see "Mining Massive Datasets" video series in the Video Series section.
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Understand the problem and scope:
            - define the use cases, with interviewer's help
--- a/translations/README-he.md
+++ b/translations/README-he.md
@ -182,7 +182,7 @@ I'm using Github's special markdown flavor, including tasks lists to check progr
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -190,9 +190,9 @@ I'm using Github's special markdown flavor, including tasks lists to check progr
 ## Get in a Googley Mood
-Print out a "[future Googler](https://github.com/jwasham/coding-interview-university/blob/master/extras/future-googler.pdf)" sign (or two) and keep your eyes on the prize.
+Print out a "[future Googler](https://github.com/jwasham/coding-interview-university/blob/main/extras/future-googler.pdf)" sign (or two) and keep your eyes on the prize.
-[![future Googler sign](https://dng5l3qzreal6.cloudfront.net/2016/Oct/Screen_Shot_2016_10_04_at_10_13_24_AM-1475601104364.png)](https://github.com/jwasham/coding-interview-university/blob/master/extras/future-googler.pdf)
+[![future Googler sign](https://dng5l3qzreal6.cloudfront.net/2016/Oct/Screen_Shot_2016_10_04_at_10_13_24_AM-1475601104364.png)](https://github.com/jwasham/coding-interview-university/blob/main/extras/future-googler.pdf)
 ## האם קיבלתי את העבודה?
@ -463,7 +463,7 @@ I made a mobile-first website so I could review on my phone and tablet, wherever
 Make your own for free:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db): Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required by Google.
+- [My flash cards database](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db): Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required by Google.
 **Note on flashcards:** The first time you recognize you know the answer, don't mark it as known. You have to see the
 same card and answer it several times correctly before you really know it. Repetition will put that knowledge deeper in
@ -697,7 +697,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -726,7 +726,6 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 ## Trees
 - ### Trees - Notes & Background
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
@ -1242,7 +1241,7 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
    - For even more, see "Mining Massive Datasets" video series in the Video Series section.
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Understand the problem and scope:
            - define the use cases, with interviewer's help
--- a/translations/README-hi.md
+++ b/translations/README-hi.md
@ -1,5 +1,5 @@
 #  कोडिंग साक्षात्कार विश्वविद्यालय
->मैं मूल रूप से इसे एक सॉफ़्टवेयर इंजीनियर बनने के लिए अध्ययन विषयों की एक छोटी-छोटी सूची के रूप में बनाया था, लेकिन यह आज की बड़ी सूची में बढ़ी है। इस अध्ययन योजना के माध्यम से जाने के बाद, [मुझे अमेज़ॅन पर सॉफ़्टवेयर डेवलपमेंट इंजीनियर के रूप में काम पर रखा गया है !](https://startupnextdoor.com/ive-been-acquired-by->amazon/?src=ciu) आपको संभवतः जितना मैंने किया उतना ही पढ़ना नहीं होगा। वैसे भी, आपको जो भी चाहिए वह यहां है
+>मैने मूल रूप से इसे एक सॉफ़्टवेयर इंजीनियर बनने के लिए अध्ययन विषयों की एक छोटी सी सूची के रूप में बनाया था, लेकिन यह आज एक बड़ी सूची में बढ़ी है। इस अध्ययन योजना के माध्यम से जाने के बाद, [मुझे अमेज़ॅन पर सॉफ़्टवेयर डेवलपमेंट इंजीनियर के रूप में काम पर रखा गया है !](https://startupnextdoor.com/ive-been-acquired-by->amazon/?src=ciu) आपको संभवतः जितना मैंने किया उतना नहीं पढ़ना होगा। वैसे भी, आपको जो भी चाहिए वह यहां है
 >
 >यहां सूचीबद्ध आइटम आपको किसी साफ्टवेयर कंपनी के बारे में साक्षात्कार में अच्छी तरह से तैयार करेंगे, जिनमें दिग्गज, अमेज़ॅन, फेसबुक, गूगल या माइक्रोसॉफ्ट शामिल हैं।
 >
@ -12,10 +12,10 @@
 यह नए सॉफ़्टवेयर इंजीनियरों या सॉफ़्टवेयर / वेब विकास से सॉफ़्टवेयर इंजीनियरिंग (जहां कंप्यूटर साइंस ज्ञान आवश्यक है) से स्विच करने के लिए है। यदि आपके पास कई वर्षों का अनुभव है और कई वर्षों के सॉफ्टवेयर इंजीनियरिंग अनुभव का दावा कर रहे हैं, तो एक कठिन साक्षात्कार की अपेक्षा करें।
-यदि आपके पास सॉफ्टवेयर / वेब विकास के कई सालों का अनुभव है, तो ध्यान दें कि सॉफ्टवेयर, वेब डेवलपमेंट से भिन्न Google, अमेज़ॅन, फेसबुक और माइक्रोसॉफ्ट दृश्य सॉफ्टवेयर इंजीनियरिंग जैसी बड़ी सॉफ्टवेयर कंपनियों और उन्हें कंप्यूटर साइंस ज्ञान की आवश्यकता होती है।
+यदि आपके पास सॉफ्टवेयर / वेब विकास के कई सालों का अनुभव है, तो ध्यान दें कि Google, अमेज़ॅन, फेसबुक और माइक्रोसॉफ्ट जैसी बड़ी सॉफ्टवेयर कंपनियों की दृष्टि में सॉफ्टवेयर इंजीनियरिंग सॉफ्टवेयर/वेब डेवलपमेंट से भिन्न है , और उन्हें कंप्यूटर साइंस ज्ञान की आवश्यकता होती है।
 यदि आप एक विश्वसनीय इंजीनियर या सिस्टम इंजीनियर बनना चाहते हैं, तो वैकल्पिक सूची (नेटवर्किंग, सुरक्षा) से अधिक जानें।
 यदि आप एक विश्वसनीयता इंजीनियर या सिस्टम इंजीनियर बनना चाहते हैं, तो वैकल्पिक सूची (नेटवर्किंग, सुरक्षा) से अधिक जानें।
 चाहिए
 ---
 ## अनुक्रमणिका
@ -42,11 +42,10 @@
    - [क़ु](#queue)
    - [हैश टेबल](#hash-table)
 - [अधिक जानकारी](#more-knowledge)
    - [एन्दिंनेस](#endianness)
    - [बाइनरी सर्च](#binary-search)
    - [बिट-वाईस ऑपेरशन](#bitwise-operations)
 - [ट्रीज](#trees)
-    - [ट्रीज पृष्टभूमि और तिपनिया](#trees---notes--background)
+    - [ट्रीज पृष्टभूमि और टिप्पणियाँ](#trees---notes--background)
    - [बाइनरी सर्च ट्री: BST](#binary-search-trees-bsts)
    - [हीप / प्रायोरिटी क्यू / बाइनरी हीप](#heap--priority-queue--binary-heap)
    - [ट्राइस](#tries)
@ -60,7 +59,7 @@
    - [Combinatorics (n choose k) & Probability](#combinatorics-n-choose-k--probability)
    - [NP, NP-Complete and Approximation Algorithms](#np-np-complete-and-approximation-algorithms)
    - [गार्बेज कलेक्शन](#garbage-collection)
-    - [काशेस](#caches)
+    - [Caches](#caches)
    - [प्रोसेस और थ्रेड](#processes-and-threads)
    - [System Design, Scalability, Data Handling](#system-design-scalability-data-handling)
    - [Papers](#papers)
@ -72,13 +71,13 @@
    - [Scheduling](#scheduling)
    - [Implement system routines](#implement-system-routines)
    - [String searching & manipulations](#string-searching--manipulations)
- [आखरी समीक्षा](#final-review)
+- [आखिरी समीक्षा](#final-review)
 - [पुस्तकें](#books)
- [कोडिंग अभ्यास/चुनौतियों](#coding-exerciseschallenges)
+- [कोडिंग अभ्यास/चुनौतियाँ](#coding-exerciseschallenges)
 - [एक बार जब आप इंटरव्यू के करीब हो](#once-youre-closer-to-the-interview)
 - [आपका रिज्यूमे](#आपका-रिज्यूमे)
 - [इंटरव्यू की सोंच](#be-thinking-of-for-when-the-interview-comes)
- [इन्तेर्विएवर के लिए प्रश्न रखे](#have-questions-for-the-interviewer)
+- [इंटरव्यूअर के लिए प्रश्न रखे](#have-questions-for-the-interviewer)
 - [अतिरिक्त पढाई (जरुरत नहीं)](#additional-learnings-not-required)
    - [इनफार्मेशन थ्योरी](#information-theory)
    - [पारिटी और हैमिंग कोड](#parity--hamming-code)
@ -87,7 +86,7 @@
    - [संक्षिप्तीकरण](#compression)
    - [नेटवर्किंग](#networking)
    - [संगणक सुरक्षा](#computer-security)
-    - [परैल्लेल प्रोग्रामिंग](#parallel-programming)
+    - [पैरेलल प्रोग्रामिंग](#parallel-programming)
    - [Messaging, Serialization, and Queueing Systems](#messaging-serialization-and-queueing-systems)
    - [Fast Fourier Transform](#fast-fourier-transform)
    - [ब्लूम फ़िल्टर](#bloom-filter)
@ -103,24 +102,24 @@
    - [Discrete math](#discrete-math)
    - [मशीन लर्निंग](#मशीन-लर्निंग)
    - [गो](#गो)
- [कुछ विषयोकी अधिक जानकारी](#कुछ-विषयोकी-अधिक-जानकारी)
+- [कुछ विषयो की अधिक जानकारी](#कुछ-विषयोकी-अधिक-जानकारी)
 - [विडियो शृखला](#विडियो-शृखला)
 - [जब आपको नौकरी मिल जाये](#जब-आपको-नौकरी-मिल-जाये)
 ---
-## इसका उपयोग क्यू करे?
+## इसका उपयोग क्यों करे?
-मैंने जब ये परियोजना शुरू की, तब मैं स्टैक और  हीप में फरक नहीं जनता था, मुजे नहीं पता था की Big-O क्या हे, ट्रीज क्या हे, या ग्राफ को पार कैसे करते हैं. अगर मुजे छाटने का अल्गोरिथम लिखना पड़ता तो मैं आपको ये बता सकता हु के वो इतना ख़ास नहीं होगा. जो भी डाटा स्ट्रक्चर का मैंने उपयोग किया वो भाषा में समाविष्ट था, और वो कैसे काम करता हे उसकी कोई जानकारी मुजे नहीं थी. मुजे कभी मेमोरी का संचालन नहीं करता पड़ा, जबतक मेरी चलाई कोई प्रोसेस "out of
+मैंने जब ये परियोजना शुरू की, तब मैं स्टैक और  हीप में फर्क नहीं जानता था, मुझे नहीं पता था की Big-O क्या हे, ट्रीज क्या हे, या ग्राफ को पार कैसे करते हैं. अगर मुझे छाटने का अल्गोरिथम लिखना पड़ता तो मैं आपको ये बता सकता हु कि वो इतना ख़ास नहीं होगा. जो भी डाटा स्ट्रक्चर का मैंने उपयोग किया वो भाषा में समाविष्ट था, और वो कैसे काम करता हे उसकी कोई जानकारी मुझे नहीं थी. मैं कभी मेमोरी का संचालन नहीं करता, जब तक मेरी चलाई कोई प्रोसेस "out of
-memory" का एरर न दे, और तब मुजे कोई वैकल्पिक हल धुन्दाना पड़ता था. मैंने मेरी जिन्दगी में  बहोत कम मुल्ती-डायमेंशनल ऐरे और बहोत सारे अस्सोसिअतिव् ऐरे का उपयोग किया हे, पर मैंने कोई भी डाटा स्ट्रक्चर शुरू से नहीं लिखा था.
+memory" का एरर न दे, और तब मुझे कोई वैकल्पिक हल ढूँढनाा पड़ता था. मैंने मेरी जिन्दगी में बहुत कम मल्टी-डायमेंशनल ऐरे और बहोत सारे associative ऐरे का उपयोग किया हे, पर मैंने कोई भी डाटा स्ट्रक्चर शुरू से नहीं लिखा था.
-पर इस अध्ययन योजना का उपयोग करने बाद मेरा नौकरी लगाने का  आत्मविश्वास बहोत बढ़ा हें. यह एक लम्बी योजना हें. यह मेरे लिए बहोत महीनोतक चलेगी. अगर आपको ईंमैसे कुछ पता हैं तो आपको कम वक्त लगेगा.
+पर इस अध्ययन योजना का उपयोग करने बाद मेरा नौकरी लगने का आत्मविश्वास बहुत बढ़ा हें. यह एक लम्बी योजना हें. यह मेरे लिए बहुत महीनो तक चली. अगर आपको इनमें से कुछ पता हैं तो आपको कम वक्त लगेगा.
 ## इसका कैसे उपयोग करे?
 नीचे सब कुछ एक रूपरेखा है, और आप ऊपर से नीचे के क्रम में पढ़े.
-मैं  गितहब के विशेष  मार्कडाउन का उपयोग कर रहा हूँ, प्रगति की जाँच करने के लिए कार्य सूचियों का प्रयोग करे.
+मैं  गिटहब के विशेष  मार्कडाउन का उपयोग कर रहा हूँ, प्रगति की जाँच करने के लिए कार्य सूचियों का प्रयोग करे.
 - [x] एक नई शाखा बनाएँ ताकि आप इस तरह की वस्तुओं की जांच कर सकते हैं, बस कोष्ठक में एक एक्स डाले: [x]
@ -128,7 +127,7 @@ memory" का एरर न दे, और तब मुजे कोई वै
 ## कभी भी आप चालाक नहीं हो ऐसा ना सोचो
- सफल सॉफ्टवेयर इंजीनियर चालाक होते हें, पर बहुत लोगो असुरक्षा होती है की वो चालाक नहीं हैं ! 
+- सफल सॉफ्टवेयर इंजीनियर चालाक होते हें, पर बहुत लोगो को असुरक्षा होती है किी वो चालाक नहीं हैं ! 
 - [The myth of the Genius Programmer](https://www.youtube.com/watch?v=0SARbwvhupQ)
 ## विडियो संसाधनों के बारे में
@ -139,7 +138,7 @@ memory" का एरर न दे, और तब मुजे कोई वै
    I'd appreciate your help converting the MOOC video links to public sources to replace the online course विडियो over time. I like using university lectures.
-## इंटरव्यू प्रकिया और साधारण इंटरव्यू तयारी
+## इंटरव्यू प्रकिया और साधारण इंटरव्यू तैयारी
 [ ] [ABC: Always Be Coding](https://medium.com/always-be-coding/abc-always-be-coding-d5f8051afce2#.4heg8zvm4)
 [ ] [Whiteboarding](https://medium.com/@dpup/whiteboarding-4df873dbba2e#.hf6jn45g1)
@ -152,18 +151,18 @@ memory" का एरर न दे, और तब मुजे कोई वै
 ## इंटरव्यू के लिए एक संगणक भाषा चुने
-इंटरव्यू मैं आप कोंसिभी एक भाषा जिसमे आप आरामदायक हो वो चुन सकते हैं, पर गूगल के लिए निम्नलिखित भाषाएँ अच्छी रहेगी:
+इंटरव्यू में आप कोई भी एक भाषा जिसमे आप आरामदायक हो वो चुन सकते हैं, पर गूगल के लिए निम्नलिखित भाषाएँ अच्छी रहेगी:
 - C++
 - Java
 - Python
-आप निम्न्लिहित भाषाएँ भी चुन सकते हैं, पर उन्हें सावधानीसे चुने
+आप निम्नलिखित भाषाएँ भी चुन सकते हैं, पर उन्हें सावधानी से चुने
 - JavaScript
 - Ruby
-आपको भाषा में बहुत सहज होना चाहिए और जानकार होना चाहिए।
+आपको भाषा में बहुत सहज होना चाहिए और जानकारी होनी चाहिए।
 विकल्पों के बारे में अधिक पढ़ें:
@ -172,14 +171,14 @@ memory" का एरर न दे, और तब मुजे कोई वै
 [भाषा संसाधनोंको यहाँ देखें](programming-language-resources.md)
-क्युकी में मैं पढ़ रहा हूँ, आपको कुछ C, C++, और Python शामिल दिखेगा. वहाँ कुछ शामिल किताबें, नीचे आखिर में देख ले.
+क्योकि में मैं पढ़ रहा हूँ, आपको कुछ C, C++, और Python शामिल दिखेगा. वहाँ कुछ शामिल किताबें, नीचे आखिर में देख ले.
 ## पुस्तक सूची
 यह मैंने जो इस्तेमाल किया था उससे छोटी सूची है यह आपको समय बचाने के लिए संक्षिप्त है
 ### इंटरव्यू प्रेप
 - [ ]  प्रोग्रामिंग साक्षात्कार का खुलासा: आपकी अगली नौकरी, दूसरी संस्करण को लैंडिंग करने के लिए रहस्य
-    - सी ++ और जावा में जवाब
+    - C++ और java में जवाब
    - यह कोडिंग साक्षात्कार के लिए क्रैकिंग के लिए एक अच्छा वार्म-अप है
    - बहुत मुश्किल नहीं है, सबसे अधिक समस्याएं आपको साक्षात्कार में जो दिखाई दे रही हैं उससे अधिक आसान हो सकती हैं (मैंने जो पढ़ा है)
 - [ ] कोडिंग साक्षात्कार, 6 वें संस्करण
@ -296,16 +295,16 @@ memory" का एरर न दे, और तब मुजे कोई वै
 इस सूची में कई महीनों से वृद्धि हुई है, और हाँ, यह एक तरह से हाथ से बाहर हो गयी हैं
-निचे कुछ गलतिया हैं जो मैंने की हैं तो आपका अनुभव बेहतर होगा
+नीचे कुछ गलतिया हैं जो मैंने की हैं तो आपका अनुभव बेहतर होगा
 ### १. आपसे यह सब याद नहीं होगा
-मैंने घंटो वीडिय के विडियो देखे और टिप्पणिया लिखी, और महीनो बाद मुजे कुछ याद नहीं रहा. सबकी समीक्षा करने के लिए मैंने 3 दिन मेरी तिप्पनिओयो और flashcards बनाने में बितायें 
+मैंने घंटो वीडियो के विडियो देखे और टिप्पणिया लिखी, और महीनो बाद मुझे कुछ याद नहीं रहा. सबकी समीक्षा करने के लिए मैंने 3 दिन मेरी टिप्पणीयो और flashcards बनाने में बितायें 
 कृपया पढ़ें तो आप मेरी गलतियां नहीं करेंगे:
 [कंप्यूटर विज्ञान ज्ञान को बनाए रखना](https://startupnextdoor.com/retaining-computer-science-knowledge/)
-### २. फ्लाश्कार्ड्स का उपयोग कीजिये 
+### २. फ़्लैशकार्ड्स का उपयोग कीजिये 
 इस समस्या को हल करने के लिए, मैंने एक छोटे से फ्लैशकार्ड साइट बनाई जहां मैं 2 प्रकार के फ्लैशकार्ड जोड़ सकता था: सामान्य और कोड प्रत्येक कार्ड के पास भिन्न स्वरूपण है।
@ -313,8 +312,8 @@ memory" का एरर न दे, और तब मुजे कोई वै
 अपना खुद का मुफ्त बनाएं:
 - [फ़्लैशकार्ड साइट रेपो] (https://github.com/jwasham/computer-science-flash-cards)
- - [मेरे फ़्लैश कार्ड डेटाबेस (पुराने - 1200 कार्ड) :](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db)
+ - [मेरे फ़्लैश कार्ड डेटाबेस (पुराने - 1200 कार्ड) :](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db)
- - [मेरा फ़्लैश कार्ड डेटाबेस (नया - 1800 कार्ड) :](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db)
+ - [मेरा फ़्लैश कार्ड डेटाबेस (नया - 1800 कार्ड) :](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db)
 ध्यान रखें मैं जहाज़ के ऊपर गया और विधानसभा भाषा और पायथन तुल्यता से लेकर मशीन सीखने और आंकड़ों तक सब कुछ कवर करने वाले कार्ड हैं। इसकी आवश्यकता के लिए यह बहुत अधिक है
@ -338,7 +337,7 @@ memory" का एरर न दे, और तब मुजे कोई वै
 ## इसमे क्या समाविष्ट नहीं हे
-यह बड़ी सूचि गूगल इंटरव्यू टिप्पणियों से व्यक्तिगत कार्य सूचि से बनायीं गयी थी. निचे कुछ प्रचलित टेक्नोलॉजी हैं पर उन्हें टिप्पणियो में समविस्ट नहीं किया गया हैं.
+यह बड़ी सूचि गूगल इंटरव्यू टिप्पणियों से व्यक्तिगत कार्य सूचि से बनायीं गयी थी. निचे कुछ प्रचलित टेक्नोलॉजी हैं पर उन्हें टिप्पणियो में समाविस्ट नहीं किया गया हैं.
 - SQL
 - Javascript
@ -346,9 +345,9 @@ memory" का एरर न दे, और तब मुजे कोई वै
 ## दैनिक योजना
-कुछ विषय एक दिन ले सकते हैं और कुछ ज्यादा.कुचो का सिर्फ पढाई हो सकती हैं पर अमल नहीं हो सकता.
+कुछ विषय एक दिन ले सकते हैं और कुछ ज्यादा. कुछो की सिर्फ पढाई हो सकती हैं पर अमल नहीं हो सकता.
-हर दिन मैं निचली सूचि से एक विषय लेता हु, उसका विडियो देखता हु, और उसका अमल निचे दिए तरह करता हूँ:
+हर दिन मैं निचली सूची से एक विषय लेता हूँ, उसका विडियो देखता हूँ, और उसका अमल नीचे दिए तरह करता हूँ:
 - C - struct और function का उपयोग करके  जो  struct * या args का  उपयोग करते हैं.
 - C++ - built-in types का उपयोग न करके
 - C++ - built-in types का उपयोग करके, जैसे STL की std::list, linked list के लिए
@ -358,7 +357,7 @@ memory" का एरर न दे, और तब मुजे कोई वै
 आपको इन सभी की ज़रूरत नहीं है साक्षात्कार के लिए आपको केवल एक ही भाषा की आवश्यकता है
 इन सब में कोड क्यों?
- अभ्यास, अभ्यास, अभ्यास, जब तक मैं इससे बीमार न हो, और यह कोई समस्या नहीं कर सकता (कुछ बहुत बढ़िया मामलों और याद रखने के लिए बहीखाता विवरण)
+- अभ्यास, अभ्यास, अभ्यास, जब तक मैं इससे बीमार न हो, और यह कोई समस्या नहीं कर सकता (कुछ बहुत बढ़िया मामलों और याद रखने के लिए बही-खाता विवरण)
 - कच्ची बाधाओं के भीतर काम करना (कचरा संग्रहण की सहायता के बिना स्मृति को आवंटित करना / मुक्त करना (पायथन को छोड़कर))
 - अंतर्निहित प्रकारों का उपयोग करें, इसलिए मुझे वास्तविक दुनिया के उपयोग के लिए निर्मित उपकरणों का उपयोग करने का अनुभव है (उत्पादन में अपनी स्वयं की लिंक्ड सूची कार्यान्वयन नहीं लिखना)
@ -371,14 +370,14 @@ memory" का एरर न दे, और तब मुजे कोई वै
 आपको हर एल्गोरिथम याद करने की आवश्यकता नहीं है।
-एक व्हाईटबोर्ड या कागज़ पर कोड लिखें, कंप्यूटर नहीं। कुछ नमूना इनपुट के साथ टेस्ट करें फिर इसे कंप्यूटर पर जांचें
+एक व्हाइटबोर्ड या कागज़ पर कोड लिखें, कंप्यूटर नहीं। कुछ नमूना इनपुट के साथ टेस्ट करें फिर इसे कंप्यूटर पर जांचें
 ## पूर्वाभ्यास ज्ञान
 - [ ] **C जानें**
    - सी हर जगह है आप पुस्तकों, व्याख्यान, वीडियो, हर जगह जब आप पढ़ रहे हैं, में उदाहरण देखेंगे।
    - [ ] [सी प्रोग्रामिंग भाषा, खंड 2](https://www.amazon.com/Programming-Language-Brian-W-Kernighan/dp/0131103628)
-        - यह एक छोटी पुस्तक है, लेकिन यह आपको सी भाषा पर एक महान संभाल देगा और यदि आप इसे थोड़ा अभ्यास करते हैं तो आपको जल्दी से कुशल मिलेगा। समझना सी आपको यह समझने में मदद करता है कि प्रोग्राम और मेमोरी कैसे काम करते हैं 
+        - यह एक छोटी पुस्तक है, लेकिन यह आपको सी भाषा पर एक महान संभाल देगा और यदि आप इसे थोड़ा अभ्यास करते हैं तो आपको जल्दी से कुशल मिलेगा। सी आपको यह समझने में मदद करता है कि प्रोग्राम और मेमोरी कैसे काम करते हैं 
        - [सवालों के जवाब](https://github.com/lekkas/c-algorithms)
 - [ ] **कंप्यूटर एक प्रोग्राम की प्रक्रिया कैसे करते हैं:**
@ -549,7 +548,7 @@ memory" का एरर न दे, और तब मुजे कोई वै
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -578,7 +577,6 @@ memory" का एरर न दे, और तब मुजे कोई वै
 ## Trees
 - ### Trees - Notes & Background
    - [ ] [Series: Core Trees (विडियो)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (विडियो)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
@ -1122,7 +1120,7 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
        - For even more, see "Mining Massive Datasets" video series in the Video Series section.
    - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
        - review: [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-        - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+        - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
        - flow:
            1. Understand the problem and scope:
                - define the use cases, with interviewer's help
@ -1364,21 +1362,21 @@ Take coding challenges every day, as many as you can.
 - [ ] [Great intro (copied from System Design section): Algorithm design:](http://www.hiredintech.com/algorithm-design/)
 - [ ] [How to Find a Solution](https://www.topcoder.com/community/data-science/data-science-tutorials/how-to-find-a-solution/)
 - [ ] [How to Dissect a Topcoder Problem Statement](https://www.topcoder.com/community/data-science/data-science-tutorials/how-to-dissect-a-topcoder-problem-statement/)
- [ ] [टॉपकोड़ेर्स के लिए गणित](https://www.topcoder.com/community/data-science/data-science-tutorials/mathematics-for-topcoders/)
+- [ ] [टॉपकोडर्स के लिए गणित](https://www.topcoder.com/community/data-science/data-science-tutorials/mathematics-for-topcoders/)
 - [ ] [डायनामिक प्रोग्रामिंग – नौसिखिया से उन्नत](https://www.topcoder.com/community/data-science/data-science-tutorials/dynamic-programming-from-novice-to-advanced/)
 - [MIT इंटरव्यू सामग्री](https://courses.csail.mit.edu/iap/interview/materials.php)
-    - [लीतकोड](https://leetcode.com/)
+    - [लीटकोड](https://leetcode.com/)
    - [टॉप कोडर](https://www.topcoder.com/)
-    - [प्रोजेक्ट यूलेर (math-focused)](https://projecteuler.net/index.php?section=problems)
+    - [प्रोजेक्ट यूलर (math-focused)](https://projecteuler.net/index.php?section=problems)
-    - [कोदवार](http://www.codewars.com)
+    - [कोडवॉर ](http://www.codewars.com)
    - [हैकररैंक](https://www.hackerrank.com/)
    - [कोदिलिटी](https://codility.com/programmers/)
    - [इंटरव्यूकेक](https://www.interviewcake.com/)
    - [इंटरव्यूबिट](https://www.interviewbit.com/invite/icjf)
-    - [प्र्ग्रम्मिंग लैंग्वेज में सुधार करने के लिए](http://exercism.io/languages)
+    - [प्रोग्रामिंग लैंग्वेज में सुधार करने के लिए](http://exercism.io/languages)
 ## Once you're closer to the interview
@ -1395,31 +1393,31 @@ Take coding challenges every day, as many as you can.
 ## इंटरव्यू की सोंच
-   निचे दिए गए विषयो के साथ साथ, अपने २० इंटरव्यू प्रश्न तयार रखे. हर एक प्रश्न के २-३ जवाब तयार रखे. आपने जो हासिल किया हे उसकी कहानी रखे.
+   निचे दिए गए विषयो के साथ साथ, अपने २० इंटरव्यू प्रश्न तैयार  रखे. हर एक प्रश्न के २-३ जवाब तैयार  रखे. आपने जो हासिल किया हे उसकी कहानी रखे.
- आपको ये नौकरी क्यू चाहिए?
+- आपको ये नौकरी क्यूँ चाहिए?
 - आपने कौनसी एक कठिन समस्या हल की हैं?
- आपकी सबसे बढ़ी चुनोतिया कोनसी थी?
+- आपकी सबसे बड़ी चुनौतियां कोनसी थी?
- आपने देखि हुए सर्वोतम और बुरी संरचनाये?
+- आपने देखी हुई सर्वोतम और बुरी संरचनाये?
 - किसी मौजूदा गूगल उत्पाद में सुधार के लिए विचार.
 - आप अपना काम सर्वोत्तम कैसे कर सकते हो, टीम के साथ या एकेले?
- आपकी कोनसी कुशलता या अनुभव आपके भूमिका में मदतगार होंगे?
+- आपकी कोनसी कुशलता या अनुभव आपके भूमिका में मददगार होंगे?
 - आपने [जॉब क्ष / प्रोजेक्ट य] में सबसे ज्यादा किससे आनद मिला? 
 - आपकी सबसे बड़ी [जॉब क्ष/ प्रोजेक्ट य] की चुनोती जिसे आपको सामना करना पड़ा?
 -  [जॉब क्ष / प्रोजेक्ट य] में से सबसे बड़ा बग?
 - आपने [जॉब क्ष / प्रोजेक्ट य] में क्या सिखा?
 - [जॉब क्ष / प्रोजेक्ट य] में आप क्या सुधार कर सकते थे/ करना चाहते थे?
-## इन्तेर्विएवर के लिए प्रश्न रखे 
+## इंटरव्यूअर के लिए प्रश्न रखे 
-    मेरे कुछ प्रश्न (मुजे पहिलेसेही कुछ जवाब बता हे पर मैं टीम की राय जानना चाहता हूँ):
+    मेरे कुछ प्रश्न (मुझे पहले से ही कुछ जवाब पता है पर मैं टीम की राय जानना चाहता हूँ):
 - आपकी टीम कितनी बड़ी हैं?
 - आपकी डेव साइकिल कैसी हैं? क्या आपको वॉटरफॉल/स्प्रिंट/एजाइल पता हैं?
 - क्या काम के पीछे भागना पड़ता हैं? या लचीलापन हैं?
 - आपकी टीम मैं निर्णय कैसे लिए जाते हैं?
 - हर सप्ताह आपकी कितनी बैठके होती हैं?
- क्या आपका काम का मौहोल काम करने मैं मदत करता हैं?
+- क्या आपका काम का माहौल काम करने मैं मदद करता हैं?
 - आप किसपे काम करते हो?
 - आपको उसमे क्या पसंद हैं?
 - आपका काम जीवन कैसा हैं?
@ -1621,7 +1619,7 @@ Take coding challenges every day, as many as you can.
    - [ ] पुस्तके:
        - [ ] [गो प्रोग्रामिंग का परिचय (ऑनलाइन मुफ्त पढ़े)](https://www.golang-book.com/books/intro)
        - [ ] [गो प्रोग्रामिंग लैंग्वेज (दोनोवन & केर्निघन)](https://www.amazon.com/Programming-Language-Addison-Wesley-Professional-Computing/dp/0134190440)
-    - [ ] [बूतकाम्प](https://www.golang-book.com/guides/bootcamp)
+    - [ ] [बूटकैंप ](https://www.golang-book.com/guides/bootcamp)
 --
@ -1711,7 +1709,7 @@ Sit back and enjoy. "netflix and skill" :P
 - [ ] [क्रिप्टोग्राफ़ी का परिचय](https://www.youtube.com/watch?v=2aHkqB2-46k&feature=youtu.be)
    - [श्रृंखला में अधिक (क्रम में नहीं)](https://www.youtube.com/channel/UC1usFRN4LCMcfIV7UjHNuQg)
- [ ] [विशाल डेटासेट खनन – स्तान्फोर्ड विश्वविद्यालय(९४ विडियो)](https://www.youtube.com/playlist?list=PLLssT5z_DsK9JDLcT8T62VtzwyW9LNepV)
+- [ ] [विशाल डेटासेट खनन – स्टैनफोर्ड विश्वविद्यालय(९४ विडियो)](https://www.youtube.com/playlist?list=PLLssT5z_DsK9JDLcT8T62VtzwyW9LNepV)
 ## शायद
@ -1723,8 +1721,8 @@ http://www.gainlo.co/ - बड़ी कंपनी के मोक इंटर
 बधाई हो!
- [१० बाते काश मुज्हे गूगल के पाहिले दिन पता होती](https://medium.com/@moonstorming/10-things-i-wish-i-knew-on-my-first-day-at-google-107581d87286#.livxn7clw)
+- [१० बाते काश मुझे गूगल के पहले दिन पता होती](https://medium.com/@moonstorming/10-things-i-wish-i-knew-on-my-first-day-at-google-107581d87286#.livxn7clw)
 सिखाते रहो.
-वास्तव में आपकी पढाई कभी ख़तम नहीं होती.
+वास्तव में आपकी पढाई कभी ख़त्म नहीं होती.
--- a/translations/README-id.md
+++ b/translations/README-id.md
--- a/translations/README-ja.md
+++ b/translations/README-ja.md
--- a/translations/README-kh.md
+++ b/translations/README-kh.md
@ -174,7 +174,7 @@ Data Structure ទាំងអស់ដែលខ្ញុំធ្លាប់
 `git commit -m "Marked x"`
-`git rebase jwasham/master`
+`git rebase jwasham/main`
 `git push --force`
@ -369,8 +369,8 @@ Data Structure ទាំងអស់ដែលខ្ញុំធ្លាប់
 អ្នកអាចបង្កេីតដោយឥតគិតថ្លៃ៖
 - [បណ្តាញឃ្លាំងផ្ទុកកាតឡើងវិញ](https://github.com/jwasham/computer-science-flash-cards)
- [មូលដ្ឋានទិន្នន័យកាតរបស់ខ្ញុំ (កាតចាស់ - ១២០០ កាត)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db)៖
+- [មូលដ្ឋានទិន្នន័យកាតរបស់ខ្ញុំ (កាតចាស់ - ១២០០ កាត)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db)៖
- [ប្រព័ន្ធទិន្នន័យកាតរបស់ខ្ញុំ (កាតថ្មី - ១៨០០)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db)៖
+- [ប្រព័ន្ធទិន្នន័យកាតរបស់ខ្ញុំ (កាតថ្មី - ១៨០០)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db)៖
 សូមចងចាំថាខ្ញុំបានឡើងលើក្តារហើយមានកាតគ្របដណ្តប់លើអ្វីៗទាំងអស់ចាប់ពីភាសាការជួបប្រជុំគ្នា និង សំនួរទាក់ទងនឹង Python រហូតដល់ការរៀនម៉ាស៊ីននិងស្ថិតិ។ វាជាវិធីច្រើនពេកសម្រាប់អ្វីដែលត្រូវការ។
@ -639,7 +639,7 @@ Data Structure ទាំងអស់ដែលខ្ញុំធ្លាប់
        - Binary search ដោយប្រើការហៅខ្លួនឯង
 - ### ប្រតិបតិ្តការ Bitwise
-    - [ ] [សន្លឹកជំនួយ Bits](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) 
+    - [ ] [សន្លឹកជំនួយ Bits](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) 
        - អ្នកគួរតែស្គាល់ អំណាច ២ ពី (២ ^ ១ ដល់ ២ ^ ១៦ និង ២ ^ ៣២)
    - [ ] ទទួលបានការយល់ដឹងដ៏ល្អអំពីការរៀបចំBitsជាមួយ៖ &, |, ^, ~, >>, <<
        - [ ] [ពាក្យ](https://en.wikipedia.org/wiki/Word_ (computer_architecture))
@ -1213,7 +1213,7 @@ Graphs អាចត្រូវបានប្រើដើម្បីបង្
 - [ ] ការអនុវត្តដំណើរការរចនាប្រព័ន្ធ៖ នេះគឺជាគំនិតមួយចំនួនដើម្បីព្យាយាមធ្វើការលើក្រដាសនីមួយៗដោយមានឯកសារមួយចំនួនស្តីពីវិធីដែលត្រូវបានដោះស្រាយនៅក្នុងពិភពពិត៖ 
    - ពិនិត្យឡើងវិញ: [The System Design Primer](https://github.com/donnemartin/system-design-primer)
    - [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. ស្វែងយល់ពីបញ្ហានិងវិសាលភាព
            - កំណត់ករណីប្រើប្រាស់ដោយមានជំនួយពីអ្នកសម្ភាសន៍
--- a/translations/README-ko.md
+++ b/translations/README-ko.md
--- a/translations/README-pl.md
+++ b/translations/README-pl.md
@ -208,7 +208,7 @@ Używam specjalnej odmiany Markdown GitHub, w tym list zadań do sprawdzania pos
 `git commit -m "Marked x"`
-`git rebase jwasham/master`
+`git rebase jwasham/main`
 `git push --force`
@ -372,8 +372,8 @@ Stworzyłem witrynę mobilną, aby móc przeglądać na moim telefonie i tableci
 Stwórz własną za darmo:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Pamiętaj, że poszedłem ostro i mam karty obejmujące wszystko, od języka asemblera i ciekawostek Python po uczenie maszynowe i statystyki. To o wiele za dużo na to, w stosunku do tego co jest wymagane.
@ -617,7 +617,7 @@ Napisz kod na tablicy lub papierze, a nie na komputerze. Testuj z niektórymi pr
        - binary search using recursion
 - ### Operacje bitowe
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Dobrze zrozum manipulowanie bitami korzystając z: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -644,7 +644,6 @@ Napisz kod na tablicy lub papierze, a nie na komputerze. Testuj z niektórymi pr
 ## Drzewa
 - ### Drzewa - uwagi & zarys
    - [ ] [Series: Core Trees (wideo)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (wideo)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - podstawy budowy drzewa
    - traversal (ścieżki)
@ -1187,7 +1186,7 @@ Trie to drzewo węzłów, które obsługuje operacje Znajdź i Wstaw [etc (...)]
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [The System Design Primer](https://github.com/donnemartin/system-design-primer)
    - [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Zrozumienie problemu i zakresu:
            - zdefiniowanie przypadków użycia, z pomocą rekrutera
--- a/translations/README-ptbr.md
+++ b/translations/README-ptbr.md
@ -1,16 +1,16 @@
 # Universidade de Entrevista de Programação
-> Originalmente eu criei isso como uma pequena lista to-do de tópicos de estudo para se tornar um engenheiro de software, 
+> Originalmente eu criei isso como uma pequena lista to-do (a fazer) de tópicos de estudo para se tornar um engenheiro de software, 
-> mas isso cresceu para a grande lista que você vê hoje. Após passar por esse plano de estudo, [Eu fui contratado 
+> mas isso cresceu para este imenso acervo que você consulta hoje. Após passar por todo esse plano de estudo, [Eu fui contratado 
 > como Engenheiro de Desenvolvimento de Software na Amazon](https://startupnextdoor.com/ive-been-acquired-by-amazon/?src=ciu)! 
 > Você provavelmente não vai precisar estudar tanto quanto eu. De qualquer maneira, tudo que você precisa está aqui.
 >
 > Os itens listados aqui irão preparar você muito bem para uma entrevista em praticamente qualquer empresa de software, 
-> incluindo as gigantes: Amazon, Facebook, Google ou Microsoft.
+> incluindo as gigantes como: Amazon, Facebook, Google ou Microsoft.
 >
 > *Boa sorte para todos vocês!*
-**Original**: [Inglês](https://github.com/jwasham/coding-interview-university/blob/master/README.md)
+**Original**: [Inglês](https://github.com/jwasham/coding-interview-university/blob/main/README.md)
 - [Acompanhe o progresso da tradução aqui!](https://github.com/jwasham/coding-interview-university/pull/115)
@ -42,14 +42,14 @@ Traduções em progresso:
 ## O que é isso?
-Esse é o meu plano de estudo mensal para ir de desenvolvedor web (autodidata, sem formação em Ciência da Computação) à engenheiro de software para uma grande empresa.
+Esse é o meu plano de estudo mensal para ir de desenvolvedor web (autodidata, sem formação em Ciência da Computação) à engenheiro de software em uma grande empresa.
 ![Programando no quadro branco - do Vale do Silício da HBO](https://d3j2pkmjtin6ou.cloudfront.net/coding-at-the-whiteboard-silicon-valley.png)
 Essa longa lista foi extraída e expandida a partir das **anotações de treinamento da Google**, então essas são as coisas que você precisa saber.
 Eu adicionei alguns itens extras no final que podem aparecer na entrevista ou serem úteis para resolver um problema. Muitos itens são da obra “[Get that job at Google](http://steve-yegge.blogspot.com/2008/03/get-that-job-at-google.html)” (Consiga aquele trabalho na Google) de Steve Yegge's e às vezes são expressados palavra-por-palavra nas anotações de treinamento da Google.
-Isso é direcionado à **engenheiros de software novos** ou àqueles que estão migrando de desenvolvimento de software/web para engenharia de software (onde conhecimento de ciência da computação é necessário). Se você tem vários anos de experiência e está alegando muitos anos de experiência com engenharia de software, pode esperar por uma entrevista mais difícil.
+Isso é direcionado à **novos engenheiros de software**, ou àqueles que estão migrando de desenvolvimento de software/web para engenharia de software, onde conhecimento sobre  ciência da computação é necessário. Se você tem vários anos de experiência e está alegando muitos anos de experiência com engenharia de software, pode esperar por uma entrevista mais difícil.
 Se você tem vários anos de experiência com desenvolvimento de software/web, observe que grandes empresas como Google, Amazon, Facebook e Microsoft consideram engenharia de software como algo distinto de desenvolvimento de software/web e elas requerem conhecimento de ciência da computação.
@ -73,13 +73,13 @@ Se você quer ser um engenheiro de confiabilidade ou engenheiro de sistemas, est
 - [Conhecimento Prévio](#conhecimento-prévio)
 - [Complexidade Algorítmica / Big-O / Análise assintótica](#complexidade-algorítmica--big-o--análise-assintótica)
 - [Estrutura de Dados](#estrutura-de-dados)
-    - [Arrays](#arrays)
+    - [Vetores (Arrays)](#arrays)
-    - [Listas Ligadas](#listas-ligadas)
+    - [Listas Ligadas (Linked List)](#listas-ligadas)
-    - [Stack](#stack)
+    - [Pilha (Stack)](#stack)
-    - [Queue (Fila)](#queue-fila)
+    - [Fila (Queue)](#queue-fila)
-    - [Tabela hash](#tabela-hash)
+    - [Tabela hash (Hash Table)](#tabela-hash)
 - [Mais Conhecimento](#mais-conhecimento)
-    - [Busca binária](#busca-binária)
+    - [Busca binária ( Binary Search)](#busca-binária)
    - [Lógica binária](#lógica-binária)
 - [Árvores](#Árvores)
    - [Árvores - Anotações e Fundamentos](#Árvores---anotações-e-fundamentos)
@ -88,17 +88,17 @@ Se você quer ser um engenheiro de confiabilidade ou engenheiro de sistemas, est
    - árvores de busca balanceadas (conceito geral, não detalhes)
    - transversais: pré-ordem, em-ordem (ordem simétrica), pós-ordem, busca em largura, busca em profundidade
 - [Ordenação](#ordenação)
-    - seleção
+    - Seleção
-    - inserção
+    - Inserção
-    - heapsort
+    - Heapsort
-    - quicksort
+    - Quicksort
-    - ordenação por mistura (merge sort)
+    - Merge sort
 - [Grafos](#grafos)
-    - directed
+    - Diretos
-    - undirected
+    - Indiretos
-    - matriz de adjacência
+    - Matriz de Adjacência
-    - lista de adjacência
+    - Lista de Adjacência
-    - traversals: BFS, DFS
+    - Traversals: BFS, DFS
 - [Ainda Mais Conhecimento](#ainda-mais-conhecimento)
    - [Recursão](#recursão)
    - [Programação Dinâmica](#programação-dinâmica)
@ -113,7 +113,7 @@ Se você quer ser um engenheiro de confiabilidade ou engenheiro de sistemas, est
    - [Agendamento](#agendamento)
    - [Implementar rotinas de sistema](#implementar-rotinas-de-sistema)
    - [Busca de string e manipulações](#busca-de-string-e-manipulações)
-    - [Tries (ou Árvore de Prefixos)](#tries-ou-Árvore-de-prefixos)
+    - [Árvore de Prefixos (Tries)](#tries-ou-Árvore-de-prefixos)
    - [Números de Ponto Flutuantes ("Floating Point Numbers")](#números-de-ponto-flutuantes-floating-point-numbers)
    - [Unicode](#unicode)
    - [Extremidade (ordenação) (ou "endianness" em Inglês)](#extremidade-ordenação-ou-endianness-em-inglês)
@ -178,13 +178,13 @@ Se você quer ser um engenheiro de confiabilidade ou engenheiro de sistemas, est
 ## Por que usar?
 Quando eu comecei esse projeto, eu não sabia diferenciar memória dinâmica de memória estática, não sabia notação Big-O, árvores, ou como percorrer um grafo. Se eu tivesse que escrever um algoritmo de ordenação, eu posso te dizer que ele não seria muito bom.
-Todas as estruturas de dados que eu já usei eram construídas dentro da linguagem, e eu não sabia como elas funcionavam por debaixo dos panos. Eu nunca tive que gerenciar memória a não ser que um processo que eu estava rodando desse um erro de "memória insuficiente", nesse caso eu teria que dar um jeito. Eu já usei alguns arrays multidimensionais na minha vida e milhares de arrays associativos, mas eu nunca criei estruturas de dados do zero.
+Todas as estruturas de dados que eu já usei eram construídas dentro da linguagem, e eu não sabia como elas funcionavam por debaixo dos panos. Eu nunca tive que gerenciar memória a não ser que um processo que eu estava rodando desse um erro de "memória insuficiente", nesse caso eu teria que dar um jeito. Eu já usei alguns vetores multidimensionais na minha vida e milhares de vetores associativos, mas eu nunca criei estruturas de dados do zero.
 É um longo plano. Você vai levar meses. Se você já é familiarizado com muitas dessas coisas, você vai precisar de muito menos tempo. 
 ## Como usar
-Tudo abaixo é um esboço, e você deve abordar os itens em ordem de cima para baixo.
+**Tudo abaixo é um esboço**, e você deve abordar os itens em ordem de cima para baixo.
 Eu estou usando a sintaxe de markdown especial do Github, incluindo listas de tarefas para verificar o progresso.
@ -205,7 +205,7 @@ Eu estou usando a sintaxe de markdown especial do Github, incluindo listas de ta
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -316,7 +316,7 @@ Se você tem mais tempo (eu quero esse livro):
 Se você ler um desses, você deverá ter todo conhecimento de estrutura de dados e algoritmos que precisará para começar a resolver problemas de programação. 
 **Você pode pular todas as aulas em vídeo nesse projeto**, a não ser que você queira uma revisão.
-[Recursos adicionais específicos a cada linguagem aqui.](programming-language-resources.md)
+[Recursos adicionais específicos a cada linguagem aqui.](../programming-language-resources.md)
 ### C++
@ -393,9 +393,9 @@ OU:
 ## Antes de começar
-Essa lista cresceu por longos meses, e sim, ela meio que saiu do controle.
+Essa lista cresceu por longos meses, e sim, ela meio que saiu do controle!
-Aqui estão alguns erros que eu cometi para que você tenha uma experiência melhor.
+**Aqui estão alguns erros que eu cometi para que você tenha uma experiência melhor**.
 ### 1. Você não se lembrará de tudo
@ -415,8 +415,8 @@ Eu fiz um website focado em mobile para que eu pudesse rever no meu celular, tab
 Faça o seu próprio, grátis:
 - [Repositório de flashcards](https://github.com/jwasham/computer-science-flash-cards)
- [Minha base de dados de flashcards (antigo - 1200 cartões)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db): 
+- [Minha base de dados de flashcards (antigo - 1200 cartões)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db): 
- [Minha base de dados de flashcards (novo - 1800 cartões)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [Minha base de dados de flashcards (novo - 1800 cartões)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Tenha em mente que eu exagerei e tenho cartões abrangendo desde linguagem assembly e trivialidades de Python até aprendizado de máquina e estatísticas. É demais para o que é requerido. 
@ -467,9 +467,9 @@ Por que programar em todas essas linguagens?
 Talvez eu não tenha tempo para fazer tudo isso para cada tema, mas eu vou tentar.
 Você pode ver meu código aqui:
- - [C] (https://github.com/jwasham/practice-c)
+ - [C](https://github.com/jwasham/practice-c)
- - [C++] (https://github.com/jwasham/practice-cpp)
+ - [C++](https://github.com/jwasham/practice-cpp)
- - [Python] (https://github.com/jwasham/practice-python)
+ - [Python](https://github.com/jwasham/practice-python)
 Você não precisa memorizar os detalhes intrínsecos de cada algoritmo.
@ -650,7 +650,7 @@ Escreva código em um quadro branco ou papel, não em um computador. Teste com u
        - busca binária usando recursividade
 - ### Lógica binária 
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) (Folha de consultas sobre Bits) - você deve conhecer várias das potências de 2 de (2^1 até 2^16 e 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) (Folha de consultas sobre Bits) - você deve conhecer várias das potências de 2 de (2^1 até 2^16 e 2^32)
    - [ ] Consiga um bom entendimento sobre manipulação de bits com: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture)) (palavras)
        - [ ] Boa introdução:
@ -679,7 +679,6 @@ Escreva código em um quadro branco ou papel, não em um computador. Teste com u
 ## Árvores
 - ### Árvores - Anotações e Fundamentos
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees) (Série: Fundamentos de Árvores - vídeo)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees) (Série: Árvores - vídeo)
    - contrução básica de árvore
    - transversal
@ -1275,7 +1274,7 @@ Você ganhará mais prática com grafos no livro do Skiena (veja a seção de li
 - [ ] Praticando o processo de design de sistema: Aqui estão algumas ideias para tentar trabalhar no papel, cada uma com documentação sobre como ela foi tratada no mundo real:
    - revisão: [The System Design Primer](https://github.com/donnemartin/system-design-primer) (A Base de Design de Sistema)
    - [System Design from HiredInTech](http://www.hiredintech.com/system-design/) (Design de Sistema, por HiredInTech)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf) (folha de consultas)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf) (folha de consultas)
    - fluxo:
        1. Compreenda o problema e seu escopo:
            - defina os casos de uso, com a ajuda do entrevistador
--- a/translations/README-ru.md
+++ b/translations/README-ru.md
--- a/translations/README-th.md
+++ b/translations/README-th.md
@ -186,7 +186,7 @@
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -392,8 +392,8 @@ Here are some mistakes I made so you'll have a better experience.
 คุณสามารถทำได้แบบฟรีๆ:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [คลัง flash card ของผม (เก่า - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [คลัง flash card ของผม (เก่า - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [คลัง flash cards ของผม (ใหม่- 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [คลัง flash cards ของผม (ใหม่- 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 คลังการ์ดของผมนั้น เนื้อหาจะครอบคลุมเกินเนื้อหาหลัก ตั้งแต่ภาษา assembly และ Python จนไปถึง machine learning และ สถิติ ซึ่งมันก็เกินกว่าที่เราต้องการ
@ -628,7 +628,7 @@ There are a lot of distractions that can take up valuable time. Focus and concen
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -657,7 +657,6 @@ There are a lot of distractions that can take up valuable time. Focus and concen
 ## Trees
 - ### Trees - Notes & Background
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
@ -1248,7 +1247,7 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
    - For even more, see "Mining Massive Datasets" video series in the Video Series section.
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Understand the problem and scope:
            - define the use cases, with interviewer's help
--- a/translations/README-tw.md
+++ b/translations/README-tw.md
--- a/translations/README-uk.md
+++ b/translations/README-uk.md
@ -181,7 +181,7 @@ Original: [англійською](README.md)
 `git commit -m "Marked x" `
-`git rebase jwasham/master `
+`git rebase jwasham/main `
 `git push --force `
@ -390,8 +390,8 @@ I made a mobile-first website so I could review on my phone and tablet, wherever
 Make your own for free:
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db):
+- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham-extreme.db):
+- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required.
@ -626,7 +626,7 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
        - binary search using recursion
 - ### Bitwise operations
-    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
+    - [ ] [Bits cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/bits-cheat-sheet.pdf) - you should know many of the powers of 2 from (2^1 to 2^16 and 2^32)
    - [ ] Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
        - [ ] [words](https://en.wikipedia.org/wiki/Word_(computer_architecture))
        - [ ] Good intro:
@ -655,7 +655,6 @@ Write code on a whiteboard or paper, not a computer. Test with some sample input
 ## Trees
 - ### Trees - Notes & Background
    - [ ] [Series: Core Trees (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Series: Trees (video)](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - basic tree construction
    - traversal
@ -1249,7 +1248,7 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
    - For even more, see "Mining Massive Datasets" video series in the Video Series section.
 - [ ] Practicing the system design process: Here are some ideas to try working through on paper, each with some documentation on how it was handled in the real world:
    - review: [System Design from HiredInTech](http://www.hiredintech.com/system-design/)
-    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/system-design.pdf)
+    - [cheat sheet](https://github.com/jwasham/coding-interview-university/blob/main/extras/cheat%20sheets/system-design.pdf)
    - flow:
        1. Understand the problem and scope:
            - define the use cases, with interviewer's help
--- a/translations/README-vi.md
+++ b/translations/README-vi.md
@ -207,7 +207,7 @@ Ok, bây giờ bạn có thể bắt đầu:
 - Check các phần đã hoàn thành bằng cách thêm `x` vào giữa cặp ngoặc vuông (`[ ]`), như thế này: `[x]`.
 - Chạy `git add .` để bắt đầu lưu lại các thay đổi.
 - Chạy `git commit -m "commit message" `. Thay `commit message` với ghi chú của bạn cho sự thay đổi đó.
- Đồng bộ thay đổi với bản fork trên Github của bạn bằng `git push origin master`.
+- Đồng bộ thay đổi với bản fork trên Github của bạn bằng `git push origin main`.
 ## Đừng nghĩ rằng bạn không đủ thông minh
@ -429,7 +429,7 @@ Tôi đã làm một trang mobile-first (lấy mobile là trọng tâm phát tri
 Tự tạo cho mình hoàn toàn miễn phí:
 - [Repo của trang thẻ ghi nhớ](https://github.com/jwasham/computer-science-flash-cards)
- [Cơ sở dữ liệu thẻ ghi nhớ của tôi](https://github.com/jwasham/computer-science-flash-cards/blob/master/cards-jwasham.db): Lưu ý là tôi có đi hơi xa và các thẻ ghi nhớ có thể bao gồm cả hợp ngữ (ngôn ngữ máy) và Python cho đến cả máy học (machine learning) và thống kê. Như thế là quá nhiều cho các yêu cầu từ Google.
+- [Cơ sở dữ liệu thẻ ghi nhớ của tôi](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db): Lưu ý là tôi có đi hơi xa và các thẻ ghi nhớ có thể bao gồm cả hợp ngữ (ngôn ngữ máy) và Python cho đến cả máy học (machine learning) và thống kê. Như thế là quá nhiều cho các yêu cầu từ Google.
 **Ghi chú dành cho các thẻ ghi nhớ:** Lần đầu tiên bạn nhận ra bạn biết câu trả lời, đừng đánh dấu là đã biết.Bạn phải xem thẻ tương tự và đưa ra câu trả lời chính xác vài lần trước khi bạn thực sự khẳng định đã nắm được vấn đề. Lặp đi lặp lại việc này sẽ giúp kiến thức được khắc sâu vào não bạn.
@ -692,7 +692,6 @@ Hãy viết code trên bảng đen hoặc trên giấy. Đừng sử dụng máy
 ## Cây
 - ### Cây - Ghi chú và kiến thức nền
    - [ ] [Chuỗi bài giảng: Căn bản về cây](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees)
    - [ ] [Chuỗi bài giảng: Cây](https://www.coursera.org/learn/data-structures/lecture/95qda/trees)
    - Xây dựng cây cơ bản.
    - Duyệt cây.