Practice problems across 75+ categories
Practice problems frequently asked at Design • 128 problems | 15 Easy | 81 Medium | 30 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 31 | Design Graph With Shortest Path Calculator | Hard | GraphDesignHeap (Priority Queue) |
| 32 | Design HashMap | Easy | ArrayHash TableLinked List |
| 33 | Design HashSet | Easy | ArrayHash TableLinked List |
| 34 | Design Hit Counter | Medium | ArrayBinary SearchDesign |
| 35 | Design In-Memory File System | Hard | Hash TableStringDesign |
| 36 | Design Linked List | Medium | Linked ListDesign |
| 37 | Design Log Storage System | Medium | Hash TableStringDesign |
| 38 | Design Memory Allocator | Medium | ArrayHash TableDesign |
| 39 | Design Most Recently Used Queue | Medium | ArrayLinked ListDivide and Conquer |
| 40 | Design Movie Rental System | Hard | ArrayHash TableDesign |
| 41 | Design Neighbor Sum Service | Easy | ArrayHash TableDesign |
| 42 | Design Parking System | Easy | DesignSimulationCounting |
| 43 | Design Phone Directory | Medium | ArrayHash TableLinked List |
| 44 | Design Search Autocomplete System | Hard | StringDepth-First SearchDesign |
| 45 | Design Skiplist | Hard | Linked ListDesign |
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