Practice problems across 75+ categories
Practice problems frequently asked at LinkedIn • 27 problems | 5 Easy | 17 Medium | 4 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | Binary Search Tree Iterator | Medium | StackTreeDesign |
| 2 | Binary Tree Zigzag Level Order Traversal | Medium | TreeBreadth-First SearchBinary Tree |
| 3 | Can Place Flowers | Easy | ArrayGreedy |
| 4 | Find Bursty Behavior | Medium | Database |
| 5 | Find Followers Count | Easy | Database |
| 6 | Find Leaves of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 7 | Find Trending Hashtags | Medium | Database |
| 8 | Find Trending Hashtags II | Hard | Database |
| 9 | Friend Requests I: Overall Acceptance Rate | Unknown | Database |
| 10 | Friend Requests II: Who Has the Most Friends | Medium | Database |
| 11 | Friends With No Mutual Friends | Medium | Database |
| 12 | Invalid Tweets | Easy | Database |
| 13 | Kth Largest Element in an Array | Medium | ArrayDivide and ConquerSorting |
| 14 | Managers with at Least 5 Direct Reports | Medium | Database |
| 15 | Nested List Weight Sum | Medium | Depth-First SearchBreadth-First Search |
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