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Yelp DSA Interview Questions
27 curated coding interview questions directly asked in Yelp technical rounds, sorted by frequency with recency and difficulty diagnostics.
27
Total Questions
7 (26%)
Easy Problems
15 (56%)
Medium Problems
5 (19%)
Hard Problems
🔥 Most Tested Topics:
Strings (13)Core DSA (7)Arrays (4)Linked List (2)Graphs (2)
📂 Sourced Datasets:
All 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% | all |
| 3 | Longest Substring Without Repeating Characters | Medium | Strings; Trees | Hashing / Sliding Window; DFS / BFS; Sliding Window | 39.1% | 100.0% | all |
| 14 | Longest Common Prefix | Easy | Core DSA | Implementation / Reasoning | 47.6% | 100.0% | all |
| 49 | Group Anagrams | Medium | Strings | Hashing / Sliding Window | 72.6% | 100.0% | all |
| 56 | Merge Intervals | Medium | Arrays | Sorting / Prefix / Scan | 51.8% | 100.0% | all |
| 126 | Word Ladder II | Hard | Strings | Hashing / Sliding Window | 27.7% | 100.0% | all |
| 127 | Word Ladder | Hard | Strings | Hashing / Sliding Window | 45.6% | 100.0% | all |
| 151 | Reverse Words in a String | Medium | Strings | Hashing / Sliding Window | 56.4% | 100.0% | all |
| 1126 | Active Businesses | Medium | Core DSA | Implementation / Reasoning | 66.0% | 100.0% | all |
| 206 | Reverse Linked List | Easy | Linked List | Two Pointers | 80.6% | 100.0% | all |
| 207 | Course Schedule | Medium | Graphs | BFS / DFS / Topological Sort | 51.4% | 100.0% | all |
| 218 | The Skyline Problem | Hard | Core DSA | Implementation / Reasoning | 45.4% | 100.0% | all |
| 242 | Valid Anagram | Easy | Strings | Hashing / Sliding Window | 68.1% | 100.0% | all |
| 347 | Top K Frequent Elements | Medium | Heap | Priority Queue | 66.4% | 100.0% | all |
| 380 | Insert Delete GetRandom O(1) | Medium | Core DSA | Implementation / Reasoning | 55.4% | 100.0% | all |
| 381 | Insert Delete GetRandom O(1) - Duplicates allowed | Hard | Arrays | Sorting / Prefix / Scan | 36.6% | 100.0% | all |
| 394 | Decode String | Medium | Strings; Dynamic Programming; Stack / Queue | Hashing / Sliding Window; State Transition; Monotonic Stack / Simulation | 62.6% | 100.0% | all |
| 1333 | Filter Restaurants by Vegan-Friendly, Price and Distance | Medium | Core DSA | Implementation / Reasoning | 64.2% | 100.0% | all |
| 443 | String Compression | Medium | Strings | Hashing / Sliding Window | 60.0% | 100.0% | all |
| 1436 | Destination City | Easy | Core DSA | Implementation / Reasoning | 79.5% | 100.0% | all |
| 1455 | Check If a Word Occurs As a Prefix of Any Word in a Sentence | Easy | Strings | Hashing / Sliding Window | 68.8% | 100.0% | all |
| 564 | Find the Closest Palindrome | Hard | Strings | Hashing / Sliding Window | 32.0% | 100.0% | all |
| 599 | Minimum Index Sum of Two Lists | Easy | Arrays; Linked List | Sorting / Prefix / Scan; Two Pointers | 59.9% | 100.0% | all |
| 692 | Top K Frequent Words | Medium | Strings; Heap | Hashing / Sliding Window; Priority Queue | 60.2% | 100.0% | all |
| 784 | Letter Case Permutation | Medium | Strings; Backtracking | Hashing / Sliding Window; Backtracking | 75.8% | 100.0% | all |
| 2038 | Remove Colored Pieces if Both Neighbors are the Same Color | Medium | Core DSA | Implementation / Reasoning | 63.1% | 100.0% | all |
| 2904 | Shortest and Lexicographically Smallest Beautiful String | Medium | Strings; Graphs | Hashing / Sliding Window; BFS / DFS / Topological Sort | 41.1% | 50.0% | all |