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PayPal DSA Interview Questions

Accelerate your product-tier fintech placement preparation with the official PayPal DSA interview preparation sheet, custom-built for freshers, SDE-1, and SDE-2 aspirants. PayPal's global scale financial infrastructure loops place a strict premium on reliable real-time payment settling algorithms, transaction audit tracking, and highly scalable caching patterns. This production-grade dataset features 55 of the most frequently asked PayPal coding interview questions across mission-critical archetypes—including transactional dynamic programming totals, graph-based security flows, dual-heap streaming analytics, and thread-safe cache designs. Integrated with direct LeetCode and GeeksforGeeks links alongside live candidate popularity metrics, this tracking sheet will maximize your platform's user engagement and organic search value.

55 Problems
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1. Subarray Sum Equals K
LeetCode•
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Very Hot
2. LRU Cache
LeetCode•
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Very Hot
3. Coin Change
LeetCode•
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Very Hot
4. Merge Intervals
LeetCode•
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Hot
5. Maximum Subarray
LeetCode•
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Hot
7. Trapping Rain Water
LeetCode•
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Very Hot
9. Search in Rotated Sorted Array
LeetCode•
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Very Hot
10. Number of Islands
LeetCode•
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Warm
11. Valid Parentheses
LeetCode•
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Hot
13. Group Anagrams
LeetCode•
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Warm
14. Two Sum
LeetCode•
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Hot
17. Word Break
LeetCode•
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Hot
19. Decode String
LeetCode•
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Hot
22. Climbing Stairs
LeetCode•
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Hot
24. Course Schedule II
LeetCode•
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Warm
25. Subsets
LeetCode•
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Warm
26. Reverse Linked List
LeetCode•
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Hot
27. Linked List Cycle
LeetCode•
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Hot
29. House Robber
LeetCode•
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Hot
30. Next Permutation
LeetCode•
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Warm
31. Rotting Oranges
LeetCode•
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Hot
32. Top K Frequent Words
LeetCode•
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Warm
36. 3Sum
LeetCode•
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Hot
37. Spiral Matrix
LeetCode•
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Warm
39. Decode Ways
LeetCode•
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Warm
42. Gas Station
LeetCode•
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Hot
43. Word Search
LeetCode•
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Warm
46. Permutations
LeetCode•
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Warm
47. Meeting Rooms
GeeksforGeeks•
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Hot
48. Check if Subtree
LeetCode•
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Warm
49. Edit Distance
LeetCode•
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Warm
50. LFU Cache
LeetCode•
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Hot
51. Continuous Subarray Sum
LeetCode•
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Very Hot
53. Target Sum
LeetCode•
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Hot
54. Evaluate Division
LeetCode•
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Warm
55. Asteroid Collision
LeetCode•
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Warm