13 curated coding interview questions directly asked in Whatnot technical rounds, sorted by frequency with recency and difficulty diagnostics.
| ID | Problem | Difficulty | Topic | Pattern | Acceptance | Frequency | Recency |
|---|---|---|---|---|---|---|---|
| 935 | Knight Dialer | Medium | Core DSA | Implementation / Reasoning | 61.9% | 100.0% | 3m |
| 680 | Valid Palindrome II | Easy | Strings | Hashing / Sliding Window | 44.3% | 100.0% | 6m |
| 1047 | Remove All Adjacent Duplicates In String | Easy | Arrays; Strings | Sorting / Prefix / Scan; Hashing / Sliding Window | 73.2% | 100.0% | 6m |
| 200 | Number of Islands | Medium | Graphs | BFS / DFS / Topological Sort | 64.4% | 87.5% | all |
| 977 | Squares of a Sorted Array | Easy | Arrays | Sorting / Prefix / Scan | 73.8% | 75.0% | all |
| 1152 | Analyze User Website Visit Pattern | Medium | Strings | Hashing / Sliding Window | 44.3% | 75.0% | all |
| 49 | Group Anagrams | Medium | Strings | Hashing / Sliding Window | 72.6% | 62.5% | all |
| 240 | Search a 2D Matrix II | Medium | Arrays; Binary Search | Sorting / Prefix / Scan; Binary Search | 57.3% | 62.5% | all |
| 79 | Word Search | Medium | Strings; Binary Search | Hashing / Sliding Window; Binary Search | 47.4% | 62.5% | all |
| 221 | Maximal Square | Medium | Core DSA | Implementation / Reasoning | 50.3% | 62.5% | all |
| 253 | Meeting Rooms II | Medium | Greedy | Greedy | 52.7% | 62.5% | all |
| 973 | K Closest Points to Origin | Medium | Core DSA | Implementation / Reasoning | 69.0% | 62.5% | all |
| 278 | First Bad Version | Easy | Core DSA | Implementation / Reasoning | 47.1% | 62.5% | all |