| S.No |
Interview Question |
Number of times candidates experienced this question in interviews |
| 1 | Longest Palindrome can be Formed by Removing or Rearranging Characters | 1566 |
| 2 | Program to Toggle all Characters in a String | 1170 |
| 3 | Check if Two given Strings are Isomorphic to each other | 1115 |
| 4 | Sort a String According to Another String | 1049 |
| 5 | Check if String Follows Order of Characters by a Pattern or not | 1031 |
| 6 | Queue using Stacks | 870 |
| 7 | Find subarray with given sum (Handles Negative Numbers) | 857 |
| 8 | Insertion in a Binary Tree | 847 |
| 9 | Print all triplets in sorted array that form AP | 768 |
| 10 | Maximum Product of Indexes of Next Greater on Left and Right | 636 |
| 11 | Find number of pairs in an array such that their XOR is 0 | 613 |
| 12 | Iterative method to find ancestors of a given binary tree | 520 |
