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FAANG Company Interview Question | Most Important MNC Interview Question

 Practice Questions


Find all triplets with zero sum


Generate all binary strings from given pattern


Count of strings that can be formed using a, b and c under given constraints


Find largest word in dictionary by deleting some characters of given string


Find subarray with given sum | Set 1 (Nonnegative Numbers)


Find the longest substring with k unique characters in a given string


Find the two non-repeating elements in an array of repeating elements


Flood fill Algorithm – how to implement fill() in paint?


Meta Strings (Check if two strings can become same after a swap in one string)


Print all Jumping Numbers smaller than or equal to a given value


Sum of all the numbers that are formed from root to leaf paths


The Celebrity Problem


Unbounded Knapsack (Repetition of items allowed)

Medium Level

Backtracking | Set 7 (Sudoku)

Boggle | Set 2 (Using Trie)

Check if a Binary Tree contains duplicate subtrees of size 2 or more

Dynamic Programming | Set 33 (Find if a string is interleaved of two other stri

Connect nodes at same level

Count BST nodes that lie in a given range

Dynamic Programming | Set 11 (Egg Dropping Puzzle)

Dynamic Programming | Set 28 (Minimum insertions to form a palindrome)

Dynamic Programming | Set 31 (Optimal Strategy for a Game)

Dynamic Programming | Set 32 (Word Break Problem)


Find four elements that sum to a given value | Set 2 ( O(n^2Logn) Solution)


Given a matrix of ‘O’ and ‘X’, replace ‘O’ with ‘X’ if surrounded by ‘X’

How to print maximum number of A’s using given four keys


Inplace rotate square matrix by 90 degrees | Set 1


Maximum absolute difference between sum of two contiguous sub-arrays


Merge two BSTs with limited extra space


Merge Overlapping Intervals

Modular Exponentiation (Power in Modular Arithmetic)

Paper Cut into Minimum Number of Squares | Set 2

Sum of bit differences among all pairs

Hard Level

Allocate minimum number of pages


Given an array arr[], find the maximum j – i such that arr[j] > arr[i]


Given a sorted dictionary of an alien language, find order of characters


Hungarian Algorithm for Assignment Problem | Set 1 (Introduction)


Implement LRU Cache


Length of the longest valid substring


Median in a stream of integers (running integers)


Sum of bit differences among all pairs


Travelling Salesman Problem | Set 1 (Naive and Dynamic Programming)


Word Break Problem using Backtracking




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