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README.md
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@ -619,20 +619,24 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
#### Mentioned in Google Coaching:
- [ ] The Algorithm Design Manual (Skiena)
- Book (can rent on kindle): http://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/dp/1849967202
- Answers: http://www.algorithm.cs.sunysb.edu/algowiki/index.php/The_Algorithms_Design_Manual_(Second_Edition)
- Book (can rent on kindle):
- http://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/dp/1849967202
- Answers:
- http://www.algorithm.cs.sunysb.edu/algowiki/index.php/The_Algorithms_Design_Manual_(Second_Edition)
- [ ] Algorithms and Programming: Problems and Solutions:
http://www.amazon.com/Algorithms-Programming-Solutions-Alexander-Shen/dp/0817638474
- [ ] Once you've understood everything in the daily plan:
read and do exercises from the books below. Then move to coding challenges (further down below)
Read first:
Once you've understood everything in the daily plan, read and do exercises from
the books below. Then move to coding challenges (further down below)
**Read first:**
- [ ] Programming Interviews Exposed: Secrets to Landing Your Next Job, 2nd Edition:
http://www.wiley.com/WileyCDA/WileyTitle/productCd-047012167X.html
Read second:
**Read second:**
- [ ] Cracking the Coding Interview, 6th Edition:
- http://www.amazon.com/Cracking-Coding-Interview-6th-Programming/dp/0984782850/

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plan.txt
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##########################################################################################
## How to read this
##########################################################################################
Everything below is an outline, and you should tackle the items in order from top to bottom.
I put an asterisk/star (*) at the beginning of a line when I'm done with it. When all sub-items are done,
I put a * at the top level, meaning the entire block is done. Sorry you have to remove all my *
to use this the same way. If you search/replace, there are a couple of places to look out for.
Sometimes I just put a * at top level if I know I've done all the subtasks, to cut down on * clutter.
##########################################################################################
## Interview Prep:
##########################################################################################
* - Videos:
* - https://www.youtube.com/watch?v=oWbUtlUhwa8&feature=youtu.be
* - https://www.youtube.com/watch?v=qc1owf2-220&feature=youtu.be
* - https://www.youtube.com/watch?v=8npJLXkcmu8
* - Articles:
* - http://www.google.com/about/careers/lifeatgoogle/hiringprocess/
* - http://steve-yegge.blogspot.com/2008/03/get-that-job-at-google.html
- all the things he mentions that you need to know are listed below
* - (very dated) http://dondodge.typepad.com/the_next_big_thing/2010/09/how-to-get-a-job-at-google-interview-questions-hiring-process.html
* - http://sites.google.com/site/steveyegge2/five-essential-phone-screen-questions
* - Additional (not suggested by Google but I added):
* - https://medium.com/always-be-coding/abc-always-be-coding-d5f8051afce2#.4heg8zvm4
* - https://medium.com/always-be-coding/four-steps-to-google-without-a-degree-8f381aa6bd5e#.asalo1vfx
* - https://medium.com/@dpup/whiteboarding-4df873dbba2e#.hf6jn45g1
* - http://www.kpcb.com/blog/lessons-learned-how-google-thinks-about-hiring-management-and-culture
* - http://www.coderust.com/blog/2014/04/10/effective-whiteboarding-during-programming-interviews/
* - Cracking The Coding Interview Set 1:
* - https://www.youtube.com/watch?v=rEJzOhC5ZtQ
* - https://www.youtube.com/watch?v=aClxtDcdpsQ
* - How to Get a Job at the Big 4:
* - https://www.youtube.com/watch?v=YJZCUhxNCv8
* - http://alexbowe.com/failing-at-google-interviews/
##########################################################################################
## Knowledge:
##########################################################################################
This short section were prerequisites/interesting info I wanted to learn before getting started on the daily plan.
You need to know C, C++, or Java to do the coding part of the interview.
They will sometimes make an exception and let you use Python or some other language, but the language
must be mainstream and allow you write your code low-level enough to solve the problems.
You'll see some C, C++ learning included below.
There are a few books involved, see the bottom.
Some videos are available only by enrolling in a Coursera or EdX class. It is free to do so.
* - how computers process a program:
* - https://www.youtube.com/watch?v=42KTvGYQYnA
* - https://www.youtube.com/watch?v=Mv2XQgpbTNE
* - how floating point numbers are stored:
* - simple 8-bit: http://math.stackexchange.com/questions/301435/fractions-in-binary
* - 32 bit: https://www.youtube.com/watch?v=ji3SfClm8TU
* - 64 bit: https://www.youtube.com/watch?v=50ZYcZebIec
* - Computer Arch Intro:
(first video only - interesting but not required) https://www.youtube.com/watch?v=zLP_X4wyHbY&list=PL5PHm2jkkXmi5CxxI7b3JCL1TWybTDtKq&index=1
* - C
* - K&R C book (ANSI C)
* - Clang: https://www.youtube.com/watch?v=U3zCxnj2w8M
* - GDB:
- https://www.youtube.com/watch?v=USPvePv1uzE
- https://www.youtube.com/watch?v=y5JmQItfFck
- Valgrind: https://www.youtube.com/watch?v=fvTsFjDuag8
* - C++
* - basics
* - pointers
* - functions
* - references
* - templates
* - compilation
* - scope & linkage
* - namespaces
* - OOP
* - STL
* - functors: http://www.cprogramming.com/tutorial/functors-function-objects-in-c++.html
* - C++ at Google: https://www.youtube.com/watch?v=NOCElcMcFik
* - Google C++ Style Guide: https://google.github.io/styleguide/cppguide.html
* - Google uses clang-format (there is a command line "style" argument: -style=google)
* - Efficiency with Algorithms, Performance with Data Structures: https://youtu.be/fHNmRkzxHWs
* - review of C++ concepts: https://www.youtube.com/watch?v=Rub-JsjMhWY
- Python
I've already read quite a bit. This is just for review.
- https://www.youtube.com/watch?v=N4mEzFDjqtA
* - compilers:
* - https://class.coursera.org/compilers-004/lecture/1
* - https://class.coursera.org/compilers-004/lecture/2
* - C++: https://www.youtube.com/watch?v=twodd1KFfGk
* - Understanding Compiler Optimization (C++): https://www.youtube.com/watch?v=FnGCDLhaxKU
----------------------------------------------------------------
The Daily Plan:
Each subject does not require a whole day to be able to understand it fully, and you can do multiple of these in a day.
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++ - 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.
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))
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.
You don't need to memorize the guts of every algorithm.
Write code on a whiteboard, not a computer. Test with some sample inputs.
Then test it out on a computer to make sure it's not buggy from syntax.
----------------------------------------------------------------
* - Before you get started:
The myth of the Genius Programmer: https://www.youtube.com/watch?v=0SARbwvhupQ
Google engineers are smart, but many have an insecurity that they aren't smart enough.
* - Algorithmic complexity / Big O / Asymptotic analysis
- nothing to implement
- Harvard CS50 - Asymptotic Notation: https://www.youtube.com/watch?v=iOq5kSKqeR4
- Big O Notations (general quick tutorial) - https://www.youtube.com/watch?v=V6mKVRU1evU
- Big O Notation (and Omega and Theta) - best mathematical explanation:
- 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
- A Gentle Introduction to Algorithm Complexity Analysis: http://discrete.gr/complexity/
- Orders of Growth: https://class.coursera.org/algorithmicthink1-004/lecture/59
- Asymptotics: https://class.coursera.org/algorithmicthink1-004/lecture/61
- UC Berkeley Big O: https://youtu.be/VIS4YDpuP98
- UC Berkeley Big Omega: https://youtu.be/ca3e7UVmeUc
- Amortized Analysis: https://www.youtube.com/watch?v=B3SpQZaAZP4&index=10&list=PL1BaGV1cIH4UhkL8a9bJGG356covJ76qN
- Illustrating "Big O": https://class.coursera.org/algorithmicthink1-004/lecture/63
- Cheat sheet: http://bigocheatsheet.com/
-----------------------------------------------------
Trees
-----------------------------------------------------
* - Arrays: (Implement an automatically resizing vector)
* - Description:
- Arrays: https://www.coursera.org/learn/data-structures/lecture/OsBSF/arrays
- Arrays: https://www.lynda.com/Developer-Programming-Foundations-tutorials/Basic-arrays/149042/177104-4.html
- Multi-dim: https://www.lynda.com/Developer-Programming-Foundations-tutorials/Multidimensional-arrays/149042/177105-4.html
- Dynamic Arrays: https://www.coursera.org/learn/data-structures/lecture/EwbnV/dynamic-arrays
- Jagged: https://www.lynda.com/Developer-Programming-Foundations-tutorials/Jagged-arrays/149042/177106-4.html
- Resizing arrays:
- https://class.coursera.org/algs4partI-010/lecture/19
- https://www.lynda.com/Developer-Programming-Foundations-tutorials/Resizable-arrays/149042/177108-4.html
* - 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
- 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
* - capacity() - number of items it can hold
* - is_empty()
* - at(index) - returns item at given index, blows up if index out of bounds
* - push(item)
* - insert(index, item) - inserts item at index, shifts that index's value and trailing elements to the right
* - prepend(item) - can use insert above at index 0
* - pop() - remove from end, return value
* - delete(index) - delete item at index, shifting all trailing elements left
* - remove(item) - looks for value and removes index holding it (even if in multiple places)
* - find(item) - looks for value and returns first index with that value, -1 if not found
* - resize(new_capacity) // private function
- when you reach capacity, resize to double the size
- when popping an item, if size is 1/4 of capacity, resize to half
* - Time
- O(1) to add/remove at end (amortized for allocations for more space), index, or update
- O(n) to insert/remove elsewhere
* - Space
- contiguous in memory, so proximity helps performance
- space needed = (array capacity, which is >= n) * size of item, but even if 2n, still O(n)
* - Linked Lists
* - Description:
* - https://www.coursera.org/learn/data-structures/lecture/kHhgK/singly-linked-lists
* - Lynda.com:
- https://www.lynda.com/Developer-Programming-Foundations-tutorials/Introduction-lists/149042/177115-4.html
- https://www.lynda.com/Developer-Programming-Foundations-tutorials/Understanding-basic-list-implementations/149042/177116-4.html
- https://www.lynda.com/Developer-Programming-Foundations-tutorials/Using-singly-doubly-linked-lists/149042/177117-4.html
- https://www.lynda.com/Developer-Programming-Foundations-tutorials/List-support-across-languages/149042/177118-4.html
* - C Code: https://www.youtube.com/watch?v=QN6FPiD0Gzo
- not the whole video, just portions about Node struct and memory allocation.
* - Linked List vs Arrays:
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/rjBs9/core-linked-lists-vs-arrays
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/QUaUd/in-the-real-world-lists-vs-arrays
* - why you should avoid linked lists:
- 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.
- https://www.eskimo.com/~scs/cclass/int/sx8.html
* - 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)
* - push_front(value) - adds an item to the front of the list
* - pop_front() - remove front item and return its value
* - push_back(value) - adds an item at the end
* - pop_back() - removes end item and returns its value
* - front() - get value of front item
* - back() - get value of end item
* - insert(index, value) - insert value at index, so current item at that index is pointed to by new item at index
* - erase(index) - removes node at given index
* - value_n_from_end(n) - returns the value of the node at nth position from the end of the list
* - reverse() - reverses the list
* - remove_value(value) - removes the first item in the list with this value
* - Doubly-linked List
- Description: https://www.coursera.org/learn/data-structures/lecture/jpGKD/doubly-linked-lists
- No need to implement
* - Stacks
* - https://www.coursera.org/learn/data-structures/lecture/UdKzQ/stacks
* - https://class.coursera.org/algs4partI-010/lecture/18
* - https://class.coursera.org/algs4partI-010/lecture/19
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Using-stacks-last-first-out/149042/177120-4.html
* - Will not implement. Implementing with array is trivial.
* - Queues
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Using-queues-first-first-out/149042/177122-4.html
* - https://class.coursera.org/algs4partI-010/lecture/20
* - https://www.coursera.org/learn/data-structures/lecture/EShpq/queue
* - Circular buffer/FIFO: https://en.wikipedia.org/wiki/Circular_buffer
* - https://class.coursera.org/algs4partI-010/lecture/23
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Priority-queues-deques/149042/177123-4.html
* - 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)
- empty()
* - Implement using fixed-sized array:
- enqueue(value) - adds item at end of available storage
- dequeue() - returns value and removes least recently added element
- empty()
- full()
* - Cost:
- a bad implementation using linked list where you enqueue at head and dequeue at tail would be O(n)
because you'd need the next to last element, causing a full traversal each dequeue
enqueue: O(1) (amortized, linked list and array [probing])
dequeue: O(1) (linked list and array)
empty: O(1) (linked list and array)
* - Hash tables
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Understanding-hash-functions/149042/177126-4.html
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Using-hash-tables/149042/177127-4.html
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Supporting-hashing/149042/177128-4.html
* - https://www.lynda.com/Developer-Programming-Foundations-tutorials/Language-support-hash-tables/149042/177129-4.html
* - https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/m7UuP/core-hash-tables
* - https://www.youtube.com/watch?v=C4Kc8xzcA68
* - https://class.coursera.org/algs4partI-010/lecture/52
* - https://class.coursera.org/algs4partI-010/lecture/53
* - https://class.coursera.org/algs4partI-010/lecture/55
* - https://class.coursera.org/algs4partI-010/lecture/56
* - https://www.coursera.org/learn/data-structures/home/week/3
* - https://www.coursera.org/learn/data-structures/lecture/NYZZP/phone-book-problem
* - distributed hash tables:
- https://www.coursera.org/learn/data-structures/lecture/DvaIb/instant-uploads-and-storage-optimization-in-dropbox
- https://www.coursera.org/learn/data-structures/lecture/tvH8H/distributed-hash-tables
* - MIT:
https://www.youtube.com/watch?v=0M_kIqhwbFo&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&index=8
https://www.youtube.com/watch?v=BRO7mVIFt08&index=9&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb
https://www.youtube.com/watch?v=rvdJDijO2Ro&index=10&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb
* - 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)
- get(key)
- remove(key)
-----------------------------------------------------
More Knowledge
-----------------------------------------------------
* - Binary search:
* - https://www.youtube.com/watch?v=D5SrAga1pno
* - https://www.khanacademy.org/computing/computer-science/algorithms/binary-search/a/binary-search
* - detail: https://www.topcoder.com/community/data-science/data-science-tutorials/binary-search/
* - Implement:
- binary search (on sorted array of integers)
- binary search using recursion
* - Bit operations
* - Get a really good understanding of manipulating bits with: &, |, ^, ~, >>, <<
* - words: https://en.wikipedia.org/wiki/Word_(computer_architecture)
* - Good intro:
https://www.youtube.com/watch?v=7jkIUgLC29I
* - https://www.youtube.com/watch?v=d0AwjSpNXR0
* - https://en.wikipedia.org/wiki/Bit_manipulation
* - https://en.wikipedia.org/wiki/Bitwise_operation
* - https://graphics.stanford.edu/~seander/bithacks.html
* - http://bits.stephan-brumme.com/
* - http://bits.stephan-brumme.com/interactive.html
* - 2s and 1s complement
- https://www.youtube.com/watch?v=lKTsv6iVxV4
- https://en.wikipedia.org/wiki/Ones%27_complement
- https://en.wikipedia.org/wiki/Two%27s_complement
* - count set bits
- https://youtu.be/Hzuzo9NJrlc
- https://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetKernighan
- http://stackoverflow.com/questions/109023/how-to-count-the-number-of-set-bits-in-a-32-bit-integer
* - round to next power of 2:
- http://bits.stephan-brumme.com/roundUpToNextPowerOfTwo.html
* - swap values:
- http://bits.stephan-brumme.com/swap.html
* - absolute value:
- http://bits.stephan-brumme.com/absInteger.html
* - Parity & Hamming Code:
* - Parity:
- https://www.youtube.com/watch?v=DdMcAUlxh1M
* - Hamming Code:
- Error detection: https://www.youtube.com/watch?v=1A_NcXxdoCc
- Error correction: https://www.youtube.com/watch?v=JAMLuxdHH8o
* - Error Checking:
- https://www.youtube.com/watch?v=wbH2VxzmoZk
-----------------------------------------------------
Trees
-----------------------------------------------------
Notes:
* - Series: https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/ovovP/core-trees
* - Series: https://www.coursera.org/learn/data-structures/lecture/95qda/trees
- basic tree construction
- traversal
- manipulation algorithms
- BFS (breadth-first search)
- MIT: https://www.youtube.com/watch?v=s-CYnVz-uh4&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&index=13
- level order (BFS, using queue)
time complexity: O(n)
space complexity: best: O(1), worst: O(n/2)=O(n)
- DFS (depth-first search)
- MIT: https://www.youtube.com/watch?v=AfSk24UTFS8&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&index=14
- notes:
time complexity: O(n)
space complexity:
best: O(log n) - avg. height of tree
worst: O(n)
- inorder (DFS: left, self, right)
- postorder (DFS: left, right, self)
- preorder (DFS: self, left, right)
~~ - Binary search trees: BSTs ~~
* - Series: https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/p82sw/core-introduction-to-binary-search-trees
* - Series: https://class.coursera.org/algs4partI-010/lecture/43
- starts with symbol table and goes through BST applications
* - https://www.coursera.org/learn/data-structures/lecture/E7cXP/introduction
* - MIT: https://www.youtube.com/watch?v=9Jry5-82I68
~~ - C/C++: ~~
* - https://www.youtube.com/watch?v=COZK7NATh4k&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=28
* - https://www.youtube.com/watch?v=hWokyBoo0aI&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=29
* - https://www.youtube.com/watch?v=Ut90klNN264&index=30&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P
* - https://www.youtube.com/watch?v=_pnqMz5nrRs&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=31
* - https://www.youtube.com/watch?v=9RHO6jU--GU&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=32
* - https://www.youtube.com/watch?v=86g8jAQug04&index=33&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P
* - https://www.youtube.com/watch?v=gm8DUJJhmY4&index=34&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P
* - https://www.youtube.com/watch?v=yEwSGhSsT0U&index=35&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P
* - https://www.youtube.com/watch?v=gcULXE7ViZw&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=36
* - https://www.youtube.com/watch?v=5cPbNCrdotA&index=37&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P
Know least one type of balanced binary tree (and know how it's implemented):
- red/black tree
- https://class.coursera.org/algs4partI-010/lecture/50
- splay trees
- https://www.coursera.org/learn/data-structures/lecture/O9nZ6/splay-trees
- AVL trees
- MIT: https://www.youtube.com/watch?v=FNeL18KsWPc&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&index=6
- https://www.coursera.org/learn/data-structures/lecture/Qq5E0/avl-trees
- https://www.coursera.org/learn/data-structures/lecture/PKEBC/avl-tree-implementation
- https://www.coursera.org/learn/data-structures/lecture/22BgE/split-and-merge
- B-Trees:
- fun fact: B could stand for Boeing, Balanced, or Bayer (co-inventor)
- https://en.wikipedia.org/wiki/B-tree
- https://class.coursera.org/algs4partI-010/lecture/51
- 2-3 (type of B-tree) Search Trees
- https://class.coursera.org/algs4partI-010/lecture/49
- N-ary trees
- https://en.wikipedia.org/wiki/K-ary_tree
- Tries
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/08Xyf/core-introduction-to-tries
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/PvlZW/core-performance-of-tries
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/DFvd3/core-implementing-a-trie
- Heap (data structure):
- https://en.wikipedia.org/wiki/Heap_(data_structure)
- https://www.coursera.org/learn/data-structures/lecture/2OpTs/introduction
- https://www.coursera.org/learn/data-structures/lecture/z3l9N/naive-implementations
- https://www.coursera.org/learn/data-structures/lecture/GRV2q/binary-trees
- https://www.coursera.org/learn/data-structures/supplement/S5xxz/tree-height-remark
- https://www.coursera.org/learn/data-structures/lecture/0g1dl/basic-operations
- https://www.coursera.org/learn/data-structures/lecture/gl5Ni/complete-binary-trees
- https://www.coursera.org/learn/data-structures/lecture/HxQo9/pseudocode
- see: https://class.coursera.org/algs4partI-010/lecture
- https://class.coursera.org/algs4partI-010/lecture/39
- Binary Heap:
Min Heap / Max Heap
- Disjoint Sets:
- https://www.coursera.org/learn/data-structures/lecture/JssSY/overview
- https://www.coursera.org/learn/data-structures/lecture/EM5D0/naive-implementations
- https://www.coursera.org/learn/data-structures/lecture/Mxu0w/trees
- https://www.coursera.org/learn/data-structures/lecture/qb4c2/union-by-rank
- https://www.coursera.org/learn/data-structures/lecture/Q9CVI/path-compression
- https://www.coursera.org/learn/data-structures/lecture/GQQLN/analysis-optional
- Priority Queue
- https://en.wikipedia.org/wiki/Priority_queue
-----------------------------------------------------
Graphs
-----------------------------------------------------
Notes:
There are three basic ways to represent a graph in memory:
- objects and pointers
- matrix
- adjacency list
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
If you get a chance, try to study up on fancier algorithms:
- Dijkstra's algorithm
- https://en.wikipedia.org/wiki/Dijkstra%27s_algorithm
- A*
- https://en.wikipedia.org/wiki/A*_search_algorithm
When asked a question, look for a graph-based solution first, then move on if none.
Compute Strongly Connected Components
- https://www.coursera.org/learn/algorithms-on-graphs/home/week/5
Implement:
Dijkstra's algorithm
A*
You'll get more graph practice in Skiena's book (see Books section below) and the interview books
-----------------------------------------------------
Sorting
-----------------------------------------------------
Notes:
- Implement & know best case/worst case, average complexity of each:
- no bubble sort - it's terrible - O(n^2)
- stability in sorting algorithms:
- http://stackoverflow.com/questions/1517793/stability-in-sorting-algorithms
- http://www.geeksforgeeks.org/stability-in-sorting-algorithms/
- Which algorithms can be used on linked lists? Which on arrays? Which on both? Is Quicksort stable?
Implement:
Mergesort
Quicksort
Insertion Sort
Selection Sort
For Curiosity:
Radix Sort: https://www.youtube.com/watch?v=xhr26ia4k38
-----------------------------------------------------
More Knowledge
-----------------------------------------------------
Caches
- LRU cache
NP and NP Complete
- Know about the most famous classes of NP-complete problems, such as traveling salesman and the knapsack problem,
and be able to recognize them when an interviewer asks you them in disguise.
- Know what NP-complete means.
Recursion
- when it is appropriate to use it
open-ended problems
- manipulate strings
- manipulate patterns
Combinatorics (n choose k)
Probability
- https://www.youtube.com/watch?v=sZkAAk9Wwa4
- https://www.youtube.com/watch?v=dNaJg-mLobQ
Dynamic Programming
Scheduling
Weighted random sampling
Implement system routines
Design patterns:
- description:
- https://www.lynda.com/Developer-Programming-Foundations-tutorials/Foundations-Programming-Design-Patterns/135365-2.html
- Patterns: https://www.youtube.com/playlist?list=PLF206E906175C7E07
- UML: https://www.youtube.com/playlist?list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc
- strategy
- singleton
- adapter
- prototype
- decorator
- visitor
- factory
Operating Systems (25 videos):
- https://www.youtube.com/watch?v=-KWd_eQYLwY&index=2&list=PL-XXv-cvA_iBDyz-ba4yDskqMDY6A1w_c
- https://www.quora.com/What-is-the-difference-between-a-process-and-a-thread
Covers:
Processes, Threads, Concurrency issues
- difference between processes and threads
- processes
- threads
- locks
- mutexes
- semaphores
- monitors
- how they work
- deadlock
- livelock
CPU activity, interrupts, context switching
Modern concurrency constructs with multicore processors
Process resource needs (memory: code, static storage, stack, heap, and also file descriptors, i/o)
Thread resource needs (shares above with other threads in 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
- threads in C++:
https://www.youtube.com/playlist?list=PL5jc9xFGsL8E12so1wlMS0r0hTQoJL74M
- stopped here: https://www.youtube.com/watch?v=_N0B5ua7oN8&list=PL5jc9xFGsL8E12so1wlMS0r0hTQoJL74M&index=4
Data handling:
- see scalability options below
Distill large data sets to single values
Transform one data set to another
Handling obscenely large amounts of data
System design:
- https://www.quora.com/How-do-I-prepare-to-answer-design-questions-in-a-technical-interview?redirected_qid=1500023
- features sets
- interfaces
- class hierarchies
- designing a system under certain constraints
- simplicity and robustness
- tradeoffs
- performance analysis and optimization
Familiarize yourself with a unix-based code editor: emacs & vi(m)
vi(m):
- https://www.youtube.com/watch?v=5givLEMcINQ&index=1&list=PL13bz4SHGmRxlZVmWQ9DvXo1fEg4UdGkr
- set of 4:
- https://www.youtube.com/watch?v=SI8TeVMX8pk
- https://www.youtube.com/watch?v=F3OO7ZIOaJE
- https://www.youtube.com/watch?v=ZYEccA_nMaI
- https://www.youtube.com/watch?v=1lYD5gwgZIA
emacs:
- https://www.youtube.com/watch?v=hbmV1bnQ-i0
- set of 3:
- https://www.youtube.com/watch?v=ujODL7MD04Q
- https://www.youtube.com/watch?v=XWpsRupJ4II
- https://www.youtube.com/watch?v=paSgzPso-yc
- https://www.youtube.com/watch?v=JWD1Fpdd4Pc
Testing
-------------------------------------------------------------------
Once you're closer to the interview:
- Cracking The Coding Interview Set 2:
- https://www.youtube.com/watch?v=4NIb9l3imAo
- https://www.youtube.com/watch?v=Eg5-tdAwclo
- https://www.youtube.com/watch?v=1fqxMuPmGak
-------------------------------------------------------------------
Extras that can't hurt:
Weighted random sampling
Vector calculus
Computer Security:
- MIT (23 videos): https://www.youtube.com/playlist?list=PLUl4u3cNGP62K2DjQLRxDNRi0z2IRWnNh
Information theory:
- Markov processes:
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/waxgx/core-markov-text-generation
- https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/gZhiC/core-implementing-markov-text-generation
- https://www.khanacademy.org/computing/computer-science/informationtheory/moderninfotheory/v/symbol-rate-information-theory
- includes Markov chain
Bloom Filter
- https://www.youtube.com/watch?v=-SuTGoFYjZs
- http://blog.michaelschmatz.com/2016/04/11/how-to-write-a-bloom-filter-cpp/
Fast Fourier Transform
- http://jakevdp.github.io/blog/2013/08/28/understanding-the-fft/
Machine Learning:
- great course: https://www.coursera.org/learn/machine-learning
- http://www.analyticsvidhya.com/blog/2016/04/neural-networks-python-theano/
- http://www.dataschool.io/
Parallel Programming:
- https://www.coursera.org/learn/parprog1/home/week/1
String search algorithm:
Knuth-Morris-Pratt (KMP):
- https://en.wikipedia.org/wiki/Knuth%E2%80%93Morris%E2%80%93Pratt_algorithm
- https://www.youtube.com/watch?v=2ogqPWJSftE
Boyer–Moore string search algorithm
- https://en.wikipedia.org/wiki/Boyer%E2%80%93Moore_string_search_algorithm
- https://www.youtube.com/watch?v=xYBM0_dChRE
-------------------------------------------------------------------
Resume:
- http://steve-yegge.blogspot.co.uk/2007_09_01_archive.html
---------------------------
Be thinking of for when the interview comes:
Think of about 20 interview questions you'll get, along the lines of the items below:
have 2-3 answers for each
Have a story, not just data, about something you accomplished
Why do you want this job?
What's a tough problem you've solved?
Biggest challenges faced?
Best/worst designs seen?
Ideas for improving an existing Google 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]?
What was the biggest challenge you faced at [job x / project y]?
What was the hardest bug you faced at [job x / project y]?
What did you learn at [job x / project y]?
What would you have done better at [job x / project y]?
---------------------------
Have questions for the interviewer.
Some of mine (I already may know answer to but want their opinion or team perspective):
- How large is your team?
- What is your dev cycle look like? Do you do waterfall/sprints/agile?
- Are rushes to deadlines common? Or is there flexibility?
- How are decisions made in your team?
- How many meetings do you have per week?
- Do you feel your work environment helps you concentrate?
- What are you working on?
- What do you like about it?
- What is the work life like?
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## Books:
##########################################################################################
Mentioned in Coaching:
The Algorithm Design Manual (Skiena)
- Book (can rent on kindle): http://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/dp/1849967202
- Answers: http://www.algorithm.cs.sunysb.edu/algowiki/index.php/The_Algorithms_Design_Manual_(Second_Edition)
Algorithms and Programming: Problems and Solutions:
http://www.amazon.com/Algorithms-Programming-Solutions-Alexander-Shen/dp/0817638474
Once you've understood everything in the daily plan:
read and do exercises from the books below. Then move to coding challenges (further down below)
Read first:
Programming Interviews Exposed: Secrets to Landing Your Next Job, 2nd Edition:
http://www.wiley.com/WileyCDA/WileyTitle/productCd-047012167X.html
Read second:
Cracking the Coding Interview, 6th Edition:
- http://www.amazon.com/Cracking-Coding-Interview-6th-Programming/dp/0984782850/
Additional (not suggested by Google but I added):
* - C Programming Language, Vol 2
* - C++ Primer Plus, 6th Edition
Introduction to Algorithms
- https://www.amazon.com/Introduction-Algorithms-3rd-MIT-Press/dp/0262033844
Programming Pearls:
- http://www.amazon.com/Programming-Pearls-2nd-Jon-Bentley/dp/0201657880
If you see people reference "The Google Resume", it was a book replaced by "Cracking the Coding Interview".
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##
##
##
## Everything below is my recommendation, not Google's, and
## you may not have enough time to watch or read them all.
## That's ok. I may not either.
##
##
##
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## Videos:
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Scalability:
- https://www.youtube.com/watch?v=9nWyWwY2Onc
- https://www.youtube.com/watch?v=H4vMcD7zKM0
CSE373 - Analysis of Algorithms (25 videos):
- https://www.youtube.com/watch?v=ZFjhkohHdAA&list=PLOtl7M3yp-DV69F32zdK7YJcNXpTunF2b&index=1
MIT 6.042: Math for CS (25 videos):
- https://www.youtube.com/watch?v=L3LMbpZIKhQ&list=PLB7540DEDD482705B
MIT 6.006: Intro to Algorithms (47 videos):
- https://www.youtube.com/watch?v=HtSuA80QTyo&list=PLUl4u3cNGP61Oq3tWYp6V_F-5jb5L2iHb&nohtml5=False
MIT 6.033: Computer System Engineering (22 videos):
- https://www.youtube.com/watch?v=zm2VP0kHl1M&list=PL6535748F59DCA484
MIT 6.046: Design and Analysis of Algorithms (34 videos):
- https://www.youtube.com/watch?v=2P-yW7LQr08&list=PLUl4u3cNGP6317WaSNfmCvGym2ucw3oGp
MIT 6.858 Computer Systems Security, Fall 2014 ():
- https://www.youtube.com/watch?v=GqmQg-cszw4&index=1&list=PLUl4u3cNGP62K2DjQLRxDNRi0z2IRWnNh
MIT 6.851: Advanced Data Structures (22 videos):
- https://www.youtube.com/watch?v=T0yzrZL1py0&list=PLUl4u3cNGP61hsJNdULdudlRL493b-XZf&index=1
Stanford: Programming Paradigms (17 videos)
- https://www.youtube.com/watch?v=jTSvthW34GU&list=PLC0B8B318B7394B6F&nohtml5=False
MIT 6.050J Information and Entropy, Spring 2008 ()
- https://www.youtube.com/watch?v=phxsQrZQupo&list=PL_2Bwul6T-A7OldmhGODImZL8KEVE38X7
Introduction to Cryptography:
- https://www.youtube.com/watch?v=2aHkqB2-46k&feature=youtu.be
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## Google:
##########################################################################################
- How Search Works:
https://www.google.com/insidesearch/howsearchworks/thestory/
https://www.youtube.com/watch?v=BNHR6IQJGZs
https://www.google.com/insidesearch/howsearchworks/
##########################################################################################
## Articles:
##########################################################################################
- https://www.topcoder.com/community/data-science/data-science-tutorials/the-importance-of-algorithms/
- http://highscalability.com/blog/2016/4/4/how-to-remove-duplicates-in-a-large-dataset-reducing-memory.html
- http://highscalability.com/blog/2016/3/23/what-does-etsys-architecture-look-like-today.html
- http://highscalability.com/blog/2016/3/21/to-compress-or-not-to-compress-that-was-ubers-question.html
- http://highscalability.com/blog/2016/3/3/asyncio-tarantool-queue-get-in-the-queue.html
- http://highscalability.com/blog/2016/2/25/when-should-approximate-query-processing-be-used.html
- http://highscalability.com/blog/2016/2/23/googles-transition-from-single-datacenter-to-failover-to-a-n.html
- http://highscalability.com/blog/2016/2/15/egnyte-architecture-lessons-learned-in-building-and-scaling.html
- http://highscalability.com/blog/2016/2/1/a-patreon-architecture-short.html
- http://highscalability.com/blog/2016/1/27/tinder-how-does-one-of-the-largest-recommendation-engines-de.html
- http://highscalability.com/blog/2016/1/25/design-of-a-modern-cache.html
- http://highscalability.com/blog/2016/1/13/live-video-streaming-at-facebook-scale.html
- http://highscalability.com/blog/2016/1/11/a-beginners-guide-to-scaling-to-11-million-users-on-amazons.html
- http://highscalability.com/blog/2015/12/16/how-does-the-use-of-docker-effect-latency.html
- http://highscalability.com/blog/2015/12/14/does-amp-counter-an-existential-threat-to-google.html
- http://highscalability.com/blog/2015/11/9/a-360-degree-view-of-the-entire-netflix-stack.html
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## Papers:
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Computing Weak Consistency in Polynomial Time
- http://dl.acm.org/ft_gateway.cfm?id=2767407&ftid=1607485&dwn=1&CFID=627637486&CFTOKEN=49290244
How Developers Search for Code: A Case Study
- http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/43835.pdf
Borg, Omega, and Kubernetes
- http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/44843.pdf
Continuous Pipelines at Google
- http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/43790.pdf
AddressSanitizer: A Fast Address Sanity Checker
- http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/37752.pdf
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## Coding exercises/challenges:
##########################################################################################
- https://courses.csail.mit.edu/iap/interview/materials.php
LeetCode: https://leetcode.com/
Project Euler: https://projecteuler.net/index.php?section=problems
TopCoder: https://www.topcoder.com/
More:
HackerRank: https://www.hackerrank.com/
Codility: https://codility.com/programmers/
InterviewCake: https://www.interviewcake.com/
InterviewBit: https://www.interviewbit.com/invite/icjf
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## Maybe:
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http://www.gainlo.co/ - Mock interviewers from big companies
##########################################################################################
## Code References:
##########################################################################################
For review questions in C book:
https://github.com/lekkas/c-algorithms
##########################################################################################
## Once you've got the job (this is mainly for me):
##########################################################################################
Books:
Clean Code
Code Complete
How to Prove It: A Structured Approach, 2nd Edition
Unix Power Tools, Third Edition
* - C++ Seasoning:
- https://www.youtube.com/watch?v=qH6sSOr-yk8
* - Better Code: Data Structures:
- https://www.youtube.com/watch?v=sWgDk-o-6ZE
C++ Talks at CPPCon:
- https://www.youtube.com/watch?v=hEx5DNLWGgA&index=2&list=PLHTh1InhhwT75gykhs7pqcR_uSiG601oh
MIT CMS.611J Creating Video Games, Fall 2014
- https://www.youtube.com/watch?v=pfDfriSjFbY&list=PLUl4u3cNGP61V4W6yRm1Am5zI94m33dXk
Compilers:
- https://class.coursera.org/compilers-004/lecture
Computer and processor architecture:
- https://class.coursera.org/comparch-003/lecture
Long series of C++ videos:
- https://www.youtube.com/playlist?list=PLfVsf4Bjg79Cu5MYkyJ-u4SyQmMhFeC1C
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## Done. ##
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This has moved to the <a href="README.md">README</a>.