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Hcl DSA Interview Questions
16 curated coding interview questions directly asked in Hcl technical rounds, sorted by frequency with recency and difficulty diagnostics.
16
Total Questions
7 (44%)
Easy Problems
8 (50%)
Medium Problems
1 (6%)
Hard Problems
🔥 Most Tested Topics:
Strings (7)Arrays (6)Trees (3)Core DSA (3)
📂 Sourced Datasets:
Last 6 monthsAll questionsOlder than 6 months
| ID | Problem | Difficulty | Topic | Pattern | Acceptance | Frequency | Recency |
|---|---|---|---|---|---|---|---|
| 1 | Two Sum | Easy | Arrays | Sorting / Prefix / Scan; Two Pointers | 57.5% | 100.0% | 6m |
| 125 | Valid Palindrome | Easy | Strings | Hashing / Sliding Window | 53.3% | 100.0% | 6m |
| 20 | Valid Parentheses | Easy | Strings | Hashing / Sliding Window | 44.2% | 87.5% | all |
| 3 | Longest Substring Without Repeating Characters | Medium | Strings; Trees | Hashing / Sliding Window; DFS / BFS; Sliding Window | 39.1% | 75.0% | all |
| 88 | Merge Sorted Array | Easy | Arrays | Sorting / Prefix / Scan | 54.9% | 75.0% | all |
| 121 | Best Time to Buy and Sell Stock | Easy | Core DSA | Implementation / Reasoning | 56.8% | 75.0% | all |
| 15 | 3Sum | Medium | Arrays | Sorting / Prefix / Scan | 39.1% | 62.5% | all |
| 344 | Reverse String | Easy | Strings | Hashing / Sliding Window | 80.8% | 62.5% | all |
| 176 | Second Highest Salary | Medium | Core DSA | Implementation / Reasoning | 47.0% | 62.5% | all |
| 185 | Department Top Three Salaries | Hard | Core DSA | Implementation / Reasoning | 60.5% | 62.5% | all |
| 5 | Longest Palindromic Substring | Medium | Strings; Trees | Hashing / Sliding Window; DFS / BFS | 37.8% | 62.5% | all |
| 647 | Palindromic Substrings | Medium | Strings; Trees | Hashing / Sliding Window; DFS / BFS | 72.8% | 62.5% | all |
| 151 | Reverse Words in a String | Medium | Strings | Hashing / Sliding Window | 56.4% | 62.5% | all |
| 53 | Maximum Subarray | Medium | Arrays | Sorting / Prefix / Scan | 53.3% | 62.5% | all |
| 268 | Missing Number | Easy | Arrays | Sorting / Prefix / Scan | 72.0% | 62.5% | all |
| 209 | Minimum Size Subarray Sum | Medium | Arrays | Sorting / Prefix / Scan | 51.7% | 62.5% | all |