| S.No |
Interview Question |
Number of times candidates experienced this question in interviews |
| 1 | Roman to Integer Leetcode Solution | 7892 |
| 2 | Unique Paths Leetcode Solution | 4680 |
| 3 | A Product Array Puzzle | 4116 |
| 4 | Decode String Leetcode Solution | 3977 |
| 5 | Bellman Ford Algorithm | 3759 |
| 6 | Trapping Rain Water Leetcode Solution | 3505 |
| 7 | Word Ladder LeetCode Solution | 3297 |
| 8 | Find Triplet in Array With a Given Sum | 3241 |
| 9 | Unique Paths II Leetcode Solution | 3076 |
| 10 | Letter Combinations of a Phone Number | 3073 |
| 11 | Stock Buy Sell to Maximize Profit | 3031 |
| 12 | Count of Triplets With Sum Less than Given Value | 2582 |
| 13 | Container With Most Water LeetCode Solution | 2344 |
| 14 | Clone Graph LeetCode Solution | 2340 |
| 15 | Unique Paths | 2318 |
| 16 | Next Permutation LeetCode Solution | 2301 |
| 17 | Graph Valid Tree LeetCode Solution | 2248 |
| 18 | Longest Increasing Path in a Matrix LeetCode Solution | 2171 |
| 19 | Best Time to Buy and Sell Stock | 2061 |
| 20 | Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest | 1966 |
| 21 | Interval Tree | 1918 |
| 22 | Trapping Rain Water LeetCode Solution | 1917 |
| 23 | Merge Overlapping Intervals II | 1816 |
| 24 | Smallest Subarray With all Occurrences of a Most Frequent Element | 1706 |
| 25 | 3 Sum | 1694 |
| 26 | Word Break | 1690 |
| 27 | Binary Tree zigzag level order Traversal | 1651 |
| 28 | My Calendar I LeetCode Solution | 1610 |
| 29 | Level order Traversal in Spiral Form | 1544 |
| 30 | Validate Binary Search Tree | 1500 |
