Practice problems across 75+ categories
Practice problems frequently asked at Design • 128 problems | 15 Easy | 81 Medium | 30 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 46 | Design Snake Game | Medium | ArrayHash TableDesign |
| 47 | Design Spreadsheet | Medium | ArrayHash TableString |
| 48 | Design SQL | Medium | ArrayHash TableString |
| 49 | Design Task Manager | Medium | Hash TableDesignHeap (Priority Queue) |
| 50 | Design Tic-Tac-Toe | Medium | ArrayHash TableDesign |
| 51 | Design Twitter | Medium | Hash TableLinked ListDesign |
| 52 | Design Underground System | Medium | Hash TableStringDesign |
| 53 | Design Video Sharing Platform | Hard | Hash TableStackDesign |
| 54 | Detect Squares | Medium | ArrayHash TableDesign |
| 55 | Dinner Plate Stacks | Hard | Hash TableStackDesign |
| 56 | Dot Product of Two Sparse Vectors | Medium | ArrayHash TableTwo Pointers |
| 57 | Encode and Decode Strings | Medium | ArrayStringDesign |
| 58 | Encode and Decode TinyURL | Medium | Hash TableStringDesign |
| 59 | Encode N-ary Tree to Binary Tree | Hard | TreeDepth-First SearchBreadth-First Search |
| 60 | Encrypt and Decrypt Strings | Hard | ArrayHash TableString |
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