| S.No |
Interview Question |
Number of times candidates experienced this question in interviews |
| 1 | Valid Parentheses LeetCode Solution | 6033 |
| 2 | Longest Substring Without Repeating Characters LeetCode Solution | 2762 |
| 3 | Implementation of Deque using Doubly Linked List | 2049 |
| 4 | Valid Anagram Leetcode Solution | 1980 |
| 5 | Kth largest element in an Array Leetcode Solutions | 1969 |
| 6 | Moving Average from Data Stream Leetcode Solution | 1415 |
| 7 | Sort Colors LeetCode Solution | 1412 |
| 8 | Check if String can Become Empty by Recursively Deleting given Substring | 1380 |
| 9 | Generate Parentheses Leetcode Solution | 1334 |
| 10 | Minimum Operations to convert X to Y | 1294 |
| 11 | Convert Sorted Array to Binary Search Tree Leetcode Solution | 1202 |
| 12 | Letter Case Permutation | 1191 |
| 13 | Smallest Multiple of a Given Number | 1116 |
| 14 | K-th Distinct Element in an Array | 1082 |
| 15 | Find Median from Data Stream LeetCode Solution | 1075 |
| 16 | Intersection of Two Linked Lists LeetCode Solution | 1067 |
| 17 | Merge Two Balanced Binary Search Trees | 1009 |
| 18 | Lowest Common Ancestor of a Binary Tree Leetcode Solution | 986 |
| 19 | Valid Parentheses Leetcode Solution | 778 |
| 20 | Analyze User Website Visit Pattern LeetCode Solution | 768 |
| 21 | Remove Minimum Number of Elements Such That no Common Element Exist in both Array | 739 |
| 22 | Check whether a given Binary Tree is Complete or not | 658 |
| 23 | Longest Substring Without Repeating Characters Leetcode Solution | 631 |
