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Google DSA Interview Questions

Master the Google DSA interview with this ultra-curated, high-yield tracking sheet designed specifically for freshers, SDE-1, and SDE-2 aspirants. This comprehensive problem-set features 55 of the most frequently asked Google coding interview questions across top-tier data structures and algorithms—including advanced graph traversals, sliding windows, and system-design APIs. Every question is rigorously categorized by real candidate frequencies, core patterns, and precise platform links from LeetCode and GeeksforGeeks, providing you with a high-impact roadmap to crack Google's highly selective technical loop and confidently clear your dream coding assessment.

55 Problems
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1. Two Sum
LeetCode•
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Hot
2. Longest Substring Without Repeating Characters
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Very Hot
3. Container With Most Water
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Very Hot
4. Next Permutation
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Hot
5. Trapping Rain Water
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Very Hot
6. Minimum Window Substring
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Very Hot
7. Sliding Window Maximum
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Very Hot
8. Subarray Sum Equals K
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Hot
9. Product of Array Except Self
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Hot
10. Merge Intervals
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Very Hot
11. Insert Interval
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Hot
12. Meeting Rooms II
GeeksforGeeks•
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Very Hot
13. Clone Graph
LeetCode•
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Warm
14. Number of Islands
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Very Hot
15. Course Schedule
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Very Hot
16. Course Schedule II
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Very Hot
17. Graph Valid Tree
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Hot
18. Alien Dictionary
GeeksforGeeks•
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Very Hot
19. Longest Increasing Path in a Matrix
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Very Hot
20. Evaluate Division
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Hot
21. Pacific Atlantic Water Flow
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Warm
22. Redundant Connection
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Hot
23. Bus Routes
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Hot
24. Word Ladder
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Very Hot
25. Rotting Oranges
LeetCode•
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Very Hot
26. LRU Cache
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Very Hot
27. Implement Trie (Prefix Tree)
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Hot
28. Design Add and Search Words Data Structure
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Hot
29. Encode and Decode Strings
GeeksforGeeks•
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Warm
30. Find Median from Data Stream
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Very Hot
31. Serialize and Deserialize Binary Tree
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Very Hot
32. Insert Delete GetRandom O(1)
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Hot
33. LFU Cache
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Hot
34. Regular Expression Matching
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Warm
35. Generate Parentheses
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Hot
36. Word Break
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Very Hot
37. Longest Increasing Subsequence
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Very Hot
38. Russian Doll Envelopes
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Warm
39. Target Sum
LeetCode•
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Warm
40. Median of Two Sorted Arrays
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Very Hot
41. Merge k Sorted Lists
LeetCode•
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Very Hot
42. Search in Rotated Sorted Array
LeetCode•
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Very Hot
43. The Skyline Problem
LeetCode•
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Hot
44. Basic Calculator
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Hot
45. Expression Add Operators
LeetCode•
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Cold
46. Decode String
LeetCode•
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Very Hot
47. Binary Tree Level Order Traversal
LeetCode•
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Very Hot
48. Binary Tree Maximum Path Sum
LeetCode•
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Very Hot
49. Lowest Common Ancestor of a Binary Tree
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Very Hot
50. Coin Change
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Very Hot
51. Edit Distance
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Hot
52. Decode Ways
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Hot
53. Reverse Linked List
LeetCode•
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Very Hot
54. Linked List Cycle
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Very Hot
55. Top K Frequent Elements
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Very Hot