Practice problems across 75+ categories
Practice problems frequently asked at Data Stream • 22 problems | 6 Easy | 9 Medium | 7 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | Data Stream as Disjoint Intervals | Hard | Hash TableBinary SearchUnion Find |
| 2 | Design a File Sharing System | Medium | Hash TableDesignSorting |
| 3 | Design an Array Statistics Tracker | Hard | Hash TableBinary SearchDesign |
| 4 | Design an Ordered Stream | Easy | ArrayHash TableDesign |
| 5 | Design Browser History | Medium | ArrayLinked ListStack |
| 6 | Design Front Middle Back Queue | Medium | ArrayLinked ListDesign |
| 7 | Design Hit Counter | Medium | ArrayBinary SearchDesign |
| 8 | Design Search Autocomplete System | Hard | StringDepth-First SearchDesign |
| 9 | Find Consecutive Integers from a Data Stream | Medium | Hash TableDesignQueue |
| 10 | Find Median from Data Stream | Hard | Two PointersDesignSorting |
| 11 | Finding MK Average | Hard | DesignQueueHeap (Priority Queue) |
| 12 | First Unique Number | Medium | ArrayHash TableDesign |
| 13 | Kth Largest Element in a Stream | Easy | TreeDesignBinary Search Tree |
| 14 | Logger Rate Limiter | Easy | Hash TableDesignData Stream |
| 15 | Moving Average from Data Stream | Easy | ArrayDesignQueue |
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