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Snapchat DSA Interview Questions
87 curated coding interview questions directly asked in Snapchat technical rounds, sorted by frequency with recency and difficulty diagnostics.
87
Total Questions
5 (6%)
Easy Problems
55 (63%)
Medium Problems
27 (31%)
Hard Problems
🔥 Most Tested Topics:
Strings (20)Core DSA (20)Arrays (17)Trees (9)Binary Search (8)
📂 Sourced Datasets:
Last 3 monthsLast 6 monthsAll questionsOlder than 6 months
| ID | Problem | Difficulty | Topic | Pattern | Acceptance | Frequency | Recency |
|---|---|---|---|---|---|---|---|
| 347 | Top K Frequent Elements | Medium | Heap | Priority Queue | 66.4% | 100.0% | 3m |
| 200 | Number of Islands | Medium | Graphs | BFS / DFS / Topological Sort | 64.4% | 87.5% | 3m |
| 146 | LRU Cache | Medium | Design | Data Structure Design | 47.4% | 87.5% | 3m |
| 39 | Combination Sum | Medium | Arrays; Backtracking | Sorting / Prefix / Scan; Backtracking | 76.5% | 87.5% | all |
| 76 | Minimum Window Substring | Hard | Arrays; Strings; Trees | Sorting / Prefix / Scan; Hashing / Sliding Window; DFS / BFS; Sliding Window | 47.5% | 87.5% | all |
| 127 | Word Ladder | Hard | Strings | Hashing / Sliding Window | 45.6% | 87.5% | all |
| 140 | Word Break II | Hard | Strings; Dynamic Programming | Hashing / Sliding Window; State Transition | 55.6% | 87.5% | all |
| 151 | Reverse Words in a String | Medium | Strings | Hashing / Sliding Window | 56.4% | 87.5% | all |
| 635 | Design Log Storage System | Medium | Design | Data Structure Design | 59.6% | 87.5% | all |
| 827 | Making A Large Island | Hard | Graphs | BFS / DFS / Topological Sort | 56.6% | 87.5% | all |
| 815 | Bus Routes | Hard | Core DSA | Implementation / Reasoning | 47.3% | 87.5% | all |
| 694 | Number of Distinct Islands | Medium | Graphs | BFS / DFS / Topological Sort | 62.8% | 87.5% | all |
| 227 | Basic Calculator II | Medium | Stack / Queue | Monotonic Stack / Simulation | 46.9% | 75.0% | 6m |
| 253 | Meeting Rooms II | Medium | Greedy | Greedy | 52.7% | 75.0% | 6m |
| 875 | Koko Eating Bananas | Medium | Binary Search | Binary Search | 50.0% | 75.0% | 6m |
| 772 | Basic Calculator III | Hard | Stack / Queue | Monotonic Stack / Simulation | 53.3% | 75.0% | 6m |
| 2258 | Escape the Spreading Fire | Hard | Core DSA | Implementation / Reasoning | 38.2% | 75.0% | 6m |
| 939 | Minimum Area Rectangle | Medium | Arrays | Sorting / Prefix / Scan | 55.4% | 75.0% | 6m |
| 362 | Design Hit Counter | Medium | Design | Data Structure Design | 69.7% | 75.0% | 6m |
| 752 | Open the Lock | Medium | Core DSA | Implementation / Reasoning | 61.3% | 75.0% | 6m |
| 36 | Valid Sudoku | Medium | Strings; Backtracking | Hashing / Sliding Window; Backtracking | 64.5% | 75.0% | all |
| 37 | Sudoku Solver | Hard | Backtracking | Backtracking | 65.5% | 75.0% | all |
| 40 | Combination Sum II | Medium | Arrays; Backtracking | Sorting / Prefix / Scan; Backtracking | 59.5% | 75.0% | all |
| 44 | Wildcard Matching | Hard | Core DSA | Implementation / Reasoning | 32.0% | 75.0% | all |
| 96 | Unique Binary Search Trees | Medium | Trees; Binary Search | DFS / BFS; Binary Search | 63.7% | 75.0% | all |
| 155 | Min Stack | Medium | Stack / Queue | Monotonic Stack / Simulation | 58.2% | 75.0% | all |
| 161 | One Edit Distance | Medium | Dynamic Programming | State Transition | 34.6% | 75.0% | all |
| 206 | Reverse Linked List | Easy | Linked List | Two Pointers | 80.6% | 75.0% | all |
| 210 | Course Schedule II | Medium | Graphs | BFS / DFS / Topological Sort | 55.5% | 75.0% | all |
| 269 | Alien Dictionary | Hard | Graphs | BFS / DFS / Topological Sort | 37.2% | 75.0% | all |
| 270 | Closest Binary Search Tree Value | Easy | Trees; Binary Search | DFS / BFS; Binary Search | 49.2% | 75.0% | all |
| 289 | Game of Life | Medium | Core DSA | Implementation / Reasoning | 72.6% | 75.0% | all |
| 312 | Burst Balloons | Hard | Core DSA | Implementation / Reasoning | 63.5% | 75.0% | all |
| 314 | Binary Tree Vertical Order Traversal | Medium | Trees | DFS / BFS | 57.8% | 75.0% | all |
| 377 | Combination Sum IV | Medium | Arrays; Backtracking | Sorting / Prefix / Scan; Backtracking | 55.1% | 75.0% | all |
| 402 | Remove K Digits | Medium | Core DSA | Implementation / Reasoning | 36.9% | 75.0% | all |
| 403 | Frog Jump | Hard | Greedy | Greedy | 47.3% | 75.0% | all |
| 439 | Ternary Expression Parser | Medium | Core DSA | Implementation / Reasoning | 62.6% | 75.0% | all |
| 443 | String Compression | Medium | Strings | Hashing / Sliding Window | 60.0% | 75.0% | all |
| 527 | Word Abbreviation | Hard | Strings | Hashing / Sliding Window | 62.7% | 75.0% | all |
| 1754 | Largest Merge Of Two Strings | Medium | Arrays; Strings | Sorting / Prefix / Scan; Hashing / Sliding Window | 53.9% | 75.0% | all |
| 964 | Least Operators to Express Number | Hard | Core DSA | Implementation / Reasoning | 48.5% | 75.0% | all |
| 803 | Bricks Falling When Hit | Hard | Core DSA | Implementation / Reasoning | 37.2% | 75.0% | all |
| 123 | Best Time to Buy and Sell Stock III | Hard | Core DSA | Implementation / Reasoning | 53.7% | 62.5% | all |
| 207 | Course Schedule | Medium | Graphs | BFS / DFS / Topological Sort | 51.4% | 62.5% | all |
| 399 | Evaluate Division | Medium | Core DSA | Implementation / Reasoning | 64.2% | 62.5% | all |
| 91 | Decode Ways | Medium | Dynamic Programming | State Transition | 38.0% | 62.5% | all |
| 296 | Best Meeting Point | Hard | Greedy | Greedy | 61.4% | 62.5% | all |
| 2316 | Count Unreachable Pairs of Nodes in an Undirected Graph | Medium | Trees; Graphs | DFS / BFS; BFS / DFS / Topological Sort | 50.0% | 62.5% | all |
| 56 | Merge Intervals | Medium | Arrays | Sorting / Prefix / Scan | 51.8% | 50.0% | all |
| 231 | Power of Two | Easy | Core DSA | Implementation / Reasoning | 50.1% | 50.0% | all |
| 1249 | Minimum Remove to Make Valid Parentheses | Medium | Arrays; Strings | Sorting / Prefix / Scan; Hashing / Sliding Window | 71.5% | 50.0% | all |
| 1293 | Shortest Path in a Grid with Obstacles Elimination | Hard | Trees | DFS / BFS | 46.3% | 50.0% | all |
| 49 | Group Anagrams | Medium | Strings | Hashing / Sliding Window | 72.6% | 50.0% | all |
| 143 | Reorder List | Medium | Linked List | Two Pointers | 65.3% | 50.0% | all |
| 212 | Word Search II | Hard | Strings; Binary Search | Hashing / Sliding Window; Binary Search | 38.5% | 50.0% | all |
| 211 | Design Add and Search Words Data Structure | Medium | Strings; Binary Search; Design | Hashing / Sliding Window; Binary Search; Data Structure Design | 48.5% | 50.0% | all |
| 460 | LFU Cache | Hard | Design | Data Structure Design | 49.2% | 50.0% | all |
| 780 | Reaching Points | Hard | Core DSA | Implementation / Reasoning | 34.4% | 50.0% | all |
| 224 | Basic Calculator | Hard | Stack / Queue | Monotonic Stack / Simulation | 46.9% | 50.0% | all |
| 79 | Word Search | Medium | Strings; Binary Search | Hashing / Sliding Window; Binary Search | 47.4% | 37.5% | all |
| 124 | Binary Tree Maximum Path Sum | Hard | Arrays; Trees | Sorting / Prefix / Scan; DFS / BFS | 42.3% | 37.5% | all |
| 2097 | Valid Arrangement of Pairs | Hard | Strings | Hashing / Sliding Window | 66.6% | 37.5% | all |
| 1268 | Search Suggestions System | Medium | Binary Search | Binary Search | 65.2% | 37.5% | all |
| 721 | Accounts Merge | Medium | Arrays | Sorting / Prefix / Scan | 61.3% | 37.5% | all |
| 787 | Cheapest Flights Within K Stops | Medium | Heap | Priority Queue | 41.8% | 37.5% | all |
| 856 | Score of Parentheses | Medium | Strings | Hashing / Sliding Window | 63.6% | 37.5% | all |
| 528 | Random Pick with Weight | Medium | Core DSA | Implementation / Reasoning | 49.1% | 37.5% | all |
| 1472 | Design Browser History | Medium | Design | Data Structure Design | 78.3% | 37.5% | all |
| 973 | K Closest Points to Origin | Medium | Core DSA | Implementation / Reasoning | 69.0% | 37.5% | all |
| 490 | The Maze | Medium | Core DSA | Implementation / Reasoning | 60.4% | 37.5% | all |
| 238 | Product of Array Except Self | Medium | Arrays | Sorting / Prefix / Scan | 68.9% | 37.5% | all |
| 33 | Search in Rotated Sorted Array | Medium | Arrays; Binary Search | Sorting / Prefix / Scan; Binary Search | 44.9% | 37.5% | all |
| 1091 | Shortest Path in Binary Matrix | Medium | Arrays | Sorting / Prefix / Scan | 51.5% | 37.5% | all |
| 3014 | Minimum Number of Pushes to Type Word I | Easy | Arrays; Strings | Sorting / Prefix / Scan; Hashing / Sliding Window | 67.1% | 37.5% | all |
| 17 | Letter Combinations of a Phone Number | Medium | Strings; Backtracking | Hashing / Sliding Window; Backtracking | 66.1% | 37.5% | all |
| 1146 | Snapshot Array | Medium | Arrays | Sorting / Prefix / Scan | 36.8% | 37.5% | all |
| 67 | Add Binary | Easy | Core DSA | Implementation / Reasoning | 58.1% | 37.5% | all |
| 1639 | Number of Ways to Form a Target String Given a Dictionary | Hard | Strings | Hashing / Sliding Window | 56.5% | 37.5% | all |
| 3 | Longest Substring Without Repeating Characters | Medium | Strings; Trees | Hashing / Sliding Window; DFS / BFS; Sliding Window | 39.1% | 37.5% | all |
| 64 | Minimum Path Sum | Medium | Arrays; Trees | Sorting / Prefix / Scan; DFS / BFS | 68.2% | 37.5% | all |
| 1074 | Number of Submatrices That Sum to Target | Hard | Arrays | Sorting / Prefix / Scan | 74.6% | 37.5% | all |
| 393 | UTF-8 Validation | Medium | Strings | Hashing / Sliding Window | 46.3% | 37.5% | all |
| 480 | Sliding Window Median | Hard | Heap | Priority Queue; Sliding Window | 39.0% | 37.5% | all |
| 886 | Possible Bipartition | Medium | Dynamic Programming | State Transition | 52.6% | 37.5% | all |
| 947 | Most Stones Removed with Same Row or Column | Medium | Core DSA | Implementation / Reasoning | 62.9% | 37.5% | all |
| 166 | Fraction to Recurring Decimal | Medium | Core DSA | Implementation / Reasoning | 30.9% | 37.5% | all |