Paytm Topics for Interview Preparation

Table of ContentEasy LevelMedium LevelHard LevelEasy LevelSegregate 0s and 1s in an arrayC Program to Check if a Given String is PalindromeC program to multiply two matric...

Table of Content Easy Level Medium Level Hard Level Easy Level Segregate 0s and 1s in an array C Program to Check if a Given String is Palindrome C program to multiply two matrices Calculate the angle between hour hand and minute hand Count frequencies of all elements in array in O(1) extra space and O(n) time Find the minimum distance between two numbers Maximum sum such that no two elements are adjacent Merge Sort Program to Count numbers on fingers Rearrange positive and negative numbers in O(n) time and O(1) extra space Write an Efficient Function to Convert a Binary Tree into its Mirror Tree Convert array into Zig-Zag fashion Count all possible paths from top left to bottom right of a mXn matrix Count all sub-arrays having sum divisible by k Find duplicates in O(n) time and O(1) extra space | Set 1 Find Excel column name from a given column number Find if there is a subarray with 0 sum Find minimum number of coins that make a given value Find the missing number in Arithmetic Progression Find the row with maximum number of 1s How to determine if a binary tree is height-balanced? Largest subarray with equal number of 0s and 1s Maximum sum such that no two elements are adjacent Merge Sort for Linked Lists Move all zeroes to end of array Print a given matrix in spiral form Print Left View of a Binary Tree Recursively remove all adjacent duplicates Reverse words in a given string Search an element in a sorted and rotated array Search in a row wise and column wise sorted matrix Segregate Even and Odd numbers Serialize and Deserialize a Binary Tree Sort a linked list of 0s, 1s and 2s Sort an array of 0s, 1s and 2s Stack | Set 2 (Infix to Postfix) Stock Buy Sell to Maximize Profit Ugly Numbers Write a function to reverse a linked list Medium Level Backtracking | Set 2 (Rat in a Maze) Bottom View of a Binary Tree How to print maximum number of 'A' using given four keys Dynamic Programming | Set 7 (Coin Change) Find Excel column name from a given column number Find the number of islands | Set 1 (Using DFS) Flattening a Linked List How to print maximum number of A's using given four keys Largest Rectangular Area in a Histogram | Set 2 Minimum Number of Platforms Required for a Railway/Bus Station Print Nodes in Top View of Binary Tree Reverse a Linked List in groups of given size Sort an array in wave form Hard Level Arrange given numbers to form the biggest number | Set 1 Arrange given numbers to form the biggest number