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Sigmoid DSA Interview Questions
13 curated coding interview questions directly asked in Sigmoid technical rounds, sorted by frequency with recency and difficulty diagnostics.
13
Total Questions
4 (31%)
Easy Problems
8 (62%)
Medium Problems
1 (8%)
Hard Problems
🔥 Most Tested Topics:
Core DSA (5)Trees (3)Strings (3)Arrays (1)Linked List (1)
📂 Sourced Datasets:
Last 6 monthsAll questionsOlder than 6 months
| ID | Problem | Difficulty | Topic | Pattern | Acceptance | Frequency | Recency |
|---|---|---|---|---|---|---|---|
| 14 | Longest Common Prefix | Easy | Core DSA | Implementation / Reasoning | 47.6% | 100.0% | 6m |
| 103 | Binary Tree Zigzag Level Order Traversal | Medium | Trees | DFS / BFS | 63.7% | 100.0% | all |
| 121 | Best Time to Buy and Sell Stock | Easy | Core DSA | Implementation / Reasoning | 56.8% | 87.5% | all |
| 238 | Product of Array Except Self | Medium | Arrays | Sorting / Prefix / Scan | 68.9% | 75.0% | all |
| 25 | Reverse Nodes in k-Group | Hard | Trees; Linked List | DFS / BFS; Two Pointers | 66.1% | 75.0% | all |
| 881 | Boats to Save People | Medium | Core DSA | Implementation / Reasoning | 61.8% | 75.0% | all |
| 20 | Valid Parentheses | Easy | Strings | Hashing / Sliding Window | 44.2% | 75.0% | all |
| 3 | Longest Substring Without Repeating Characters | Medium | Strings; Trees | Hashing / Sliding Window; DFS / BFS; Sliding Window | 39.1% | 75.0% | all |
| 155 | Min Stack | Medium | Stack / Queue | Monotonic Stack / Simulation | 58.2% | 75.0% | all |
| 122 | Best Time to Buy and Sell Stock II | Medium | Core DSA | Implementation / Reasoning | 71.1% | 75.0% | all |
| 283 | Move Zeroes | Easy | Core DSA | Two Pointers | 63.8% | 75.0% | all |
| 49 | Group Anagrams | Medium | Strings | Hashing / Sliding Window | 72.6% | 75.0% | all |
| 322 | Coin Change | Medium | Dynamic Programming | State Transition | 48.4% | 75.0% | all |
