9 curated coding interview questions directly asked in Confluent technical rounds, sorted by frequency with recency and difficulty diagnostics.
| ID | Problem | Difficulty | Topic | Pattern | Acceptance | Frequency | Recency |
|---|---|---|---|---|---|---|---|
| 37 | Sudoku Solver | Hard | Backtracking | Backtracking | 65.5% | 100.0% | 3m |
| 36 | Valid Sudoku | Medium | Strings; Backtracking | Hashing / Sliding Window; Backtracking | 64.5% | 100.0% | 3m |
| 981 | Time Based Key-Value Store | Medium | Core DSA | Implementation / Reasoning | 49.9% | 100.0% | all |
| 1797 | Design Authentication Manager | Medium | Design | Data Structure Design | 58.6% | 87.5% | 3m |
| 146 | LRU Cache | Medium | Design | Data Structure Design | 47.4% | 87.5% | all |
| 2604 | Minimum Time to Eat All Grains | Hard | Arrays | Sorting / Prefix / Scan | 40.9% | 87.5% | all |
| 39 | Combination Sum | Medium | Arrays; Backtracking | Sorting / Prefix / Scan; Backtracking | 76.5% | 75.0% | all |
| 2627 | Debounce | Medium | Core DSA | Implementation / Reasoning | 91.7% | 50.0% | all |
| 2622 | Cache With Time Limit | Medium | Core DSA | Implementation / Reasoning | 76.1% | 50.0% | all |