By Rui Ming
This publication has 25 crucial coding difficulties supplemented via C++ options excellent for technical interview arrangements for a software program Developer place at tech titans like Google, Microsoft, fb, Apple, Twitter, Amazon or many Silicon Valley startups.
This publication offers you hand picked 25 critical coding difficulties (katas) that each software program Developer needs to completely know the way to unravel. the matter set covers uncomplicated facts constitution problem(s) (Linked record, Binary Tree, String, Array, HashTable), Bit Manipulations, Sorting, Numerical, Combinatorics and uncomplicated algorithms thoughts reminiscent of grasping set of rules and Divide-and-Conquer.
Each challenge is followed through a operating and concise C++ resolution, non-compulsory illustrations, research and attempt circumstances. we attempt to maintain the recommendations fresh, basic, and concise. also, comparable adaptations to the issues also are supplied for every given challenge. many of the difficulties provided during this ebook require readers to have simple familiarity with algorithms taught in an undergraduate point algorithms category and a operating wisdom of C++ programming language and simple familiarity with STL library.
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Additional info for 25 quintessential programming interview problems. Set A
Variation 3: implement PreOrderIterator. Variation 4: implement PostOrderIterator. Sort (Linked List) Sorted a Linked List with O(log n) complexity. Variation 1: implement merge function for 2 sorted arrays. Variation 2: given k sorted Linked List, merge them into a single sorted Linked List. Variation 3: use external merge algorithm to merge N files. Tic-Tac-Toe Winner Given a 3x3 Tic-Tac-Toe board configuration represented as a 2D matrix, decide if there is any winner and returns the winner color (black or white).
For example for a sequence of [5, 1, 1, 5], the answer is [5,5]. [5,1] or [5,1,5] or [1,1,5] are not valid candidates because it contains adjacent items of the original sequence. Variation 3: Max Product of Subarray. Variation 4: Max Sum of Sub [2D] Matrix. Pair Sum to k Given an unsorted array of integers that can contain negative and positive values, return all pairs that sum to k, where k is also an integer. Can you do it better than O(n^2)? Variation 1: write an O(n^2) algorithm to return all triplets that sum to k.
F’ is the second non-repeating character. Test Cases 1. get(0) – non existent item 2. set(0, 1000) followed by get(0) – should put key 0 on the cache and returns the value 1000 3. set(0, 1001) followed by get(0) – key 0 value should now be updated to 1001 4. set until max capacity reached followed by get(0) – key 0 should be evicted now from the cache Solution Generally, when you are asked this problem during a technical interview, you are expected to come up with a solution that uses doubly-linked list and a map that enables efficient key lookup that stores an iterator to the node in the doubly-linked list data structure for a fast lookup instead of searching linearly.