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Microsoft DSA Interview Questions

Accelerate your tech career with the ultimate Microsoft DSA interview preparation sheet, meticulously tailored for freshers, SDE-1, SDE-2, and IDC aspirants. This data-driven problem set features 55 of the most frequently tracked Microsoft coding interview questions, compiled directly from recent Online Assessments (OA) and technical onsite loops. Heavily focusing on Microsoft's favorite core archetypes—including optimized string manipulation, matrix traversals, tree balancing, dynamic programming, and thread-safe design patterns—this comprehensive list provides verified LeetCode and GeeksforGeeks links alongside real-world popularity tags to give your platform users a definitive edge in cracking the Microsoft technical round.

55 Problems
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1. Two Sum
LeetCode•
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Very Hot
2. Longest Substring Without Repeating Characters
LeetCode•
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Very Hot
3. Merge Sorted Array
LeetCode•
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Very Hot
4. LRU Cache
LeetCode•
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Very Hot
5. Maximum Subarray
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Hot
6. Climbing Stairs
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Hot
7. Number of Islands
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Very Hot
8. Subarray Sum Equals K
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Hot
9. Best Time to Buy and Sell Stock
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Very Hot
10. Add Two Numbers
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Hot
11. Valid Parentheses
LeetCode•
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Very Hot
12. Merge Two Sorted Lists
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Hot
13. Search in Rotated Sorted Array
LeetCode•
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Very Hot
14. Reverse Linked List
LeetCode•
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Very Hot
15. 3Sum
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Very Hot
16. Spiral Matrix
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Hot
17. Group Anagrams
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Hot
18. Container With Most Water
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Hot
19. Product of Array Except Self
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Very Hot
20. Longest Palindromic Substring
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Hot
21. Word Search
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Very Hot
22. Validate Binary Search Tree
LeetCode•
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Hot
23. Binary Tree Level Order Traversal
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Hot
24. Lowest Common Ancestor of a Binary Tree
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Very Hot
25. Merge Intervals
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Hot
26. Min Stack
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Warm
27. Copy List with Random Pointer
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Hot
28. Find Median from Data Stream
LeetCode•
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Very Hot
29. Meeting Rooms II
GeeksforGeeks•
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Very Hot
30. Rotting Oranges
LeetCode•
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Very Hot
31. Coin Change
LeetCode•
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Hot
32. Koko Eating Bananas
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Warm
33. Top K Frequent Elements
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Hot
34. Reverse Nodes in k-Group
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Very Hot
35. Max Stack
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Hot
36. Integer to English Words
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Hot
37. Alien Dictionary
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Warm
38. Median of Two Sorted Arrays
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Hot
39. Binary Tree Maximum Path Sum
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Hot
40. Merge k Sorted Lists
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Hot
41. Longest Consecutive Sequence
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Very Hot
42. Move Zeroes
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Hot
43. Flood Fill
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Warm
44. Diameter of Binary Tree
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Hot
45. Linked List Cycle
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Very Hot
46. Invert Binary Tree
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Hot
47. Trapping Rain Water
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Very Hot
48. Word Ladder
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Hot
49. Edit Distance
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Warm
50. Subsets
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Hot
51. Permutations
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Hot
52. Decode Ways
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Warm
53. House Robber
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Hot
54. Implement Trie (Prefix Tree)
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Hot
55. Heaters
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