Fundesk Data Structure & Algorithms Problems List

This is a curated list of all the important data structure & algorithms problems
asked during interviews by top companies

Data Structures & Algorithms Problems

• Maximum sum from non-adjacent subsequence 
• Permute Two Arrays such that Sum of Every Pair is Greater or Equal to K 
• Search an array where adjacent differ by at most k 
• Product of array except self 
• Inversion of Array 
• Maximum product subarray 
• 3 Sum 
• Smallest window in string consisting of all characters of other string 
• Make array elements equal with minimum cost 
• Pair with given sum in rotated array 
• 4 Sum - Find four elements that sum to a given target value 
• Zero Sum Subarray 
• Top k frequent elements 
• Spiral Matrix 
• Delete given node from linked list without head 
• Rotate Image 
• Remove duplicates from an unsorted singly linked list 
• Replace 'O' with 'X' in a Matrix 
• Word Search Grid Traversal 
• Sort a Linked List with 0s 1s and 2s 
• Counting Sort 
• Common Element in all Rows of a Given Row-Wise Sorted Matrix 
• Remove nth node from the end of Linked List 
• Common Element in Sorted Array 
• Container with most water 
• Reorder List 
• Ceiling in a sorted array 
• Longest Repeating Character Replacement 
• Intersection point of two linked lists 
• Find pair with given difference 
• Majority Frequency Element 
• Longest subarray with sum divisible by k 
• Find a pair with given sum in a rotated sorted array 
• Find the no of islands in a 2D Array/Matrix 
• Find the missing number in a sorted array 
• Find minimum no of coins required for a given amount 
• Best Time to Buy and Sell Stock 
• Chocolate Distribution Problem 
• Check for balanced brackets or valid parenthesis in an expression 
• Remove consecutive characters from a string expression 
• Print duplicate characters in a string 
• Longest Substring Without Repeating Characters 
• Group Anagrams 
• Longest Palindromic Substring 
• Count Palindromic Substrings 
• Next Permutation 
• Count the number of palindromic subsequences 
• Zigzag (Diagonal) traversal of Matrix 
• Set Matrix Zero 
• Count triplets with sum less than given value 