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HSBC DSA Interview Questions

Got an HSBC Software Engineer or Technology Graduate interview coming up in 2026? This DSA sheet is tailored to what HSBC actually asks — a practical mix of arrays, strings, and hash-based problems, core linked list and tree fundamentals, and a handful of OOP design questions drawn from real banking workflows like account management and transaction processing. HSBC's coding rounds tend to favor strong fundamentals and clean logic over obscure edge cases, so consistency across easy-to-medium problems matters more than chasing hard-only prep. This sheet compiles 52 of the most frequently reported HSBC interview questions from LeetCode and GeeksforGeeks, tagged by topic, difficulty, and candidate-reported popularity, giving you a focused, no-fluff path to interview-ready.

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1. Two Sum
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2. Valid Parentheses
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3. Best Time to Buy and Sell Stock
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4. Contains Duplicate
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5. Valid Anagram
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6. Group Anagrams
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7. Merge Intervals
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8. Maximum Subarray
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9. Product of Array Except Self
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10. Move Zeroes
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11. Two Sum II - Input Array Is Sorted
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12. 3Sum
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13. Search in Rotated Sorted Array
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14. Binary Search
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15. First Bad Version
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16. Longest Substring Without Repeating Characters
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17. Longest Palindromic Substring
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18. String to Integer (atoi)
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19. Reverse Words in a String
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20. Reverse Linked List
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21. Merge Two Sorted Lists
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22. Linked List Cycle
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23. Remove Nth Node From End of List
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24. Binary Tree Inorder Traversal
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25. Binary Tree Level Order Traversal
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26. Maximum Depth of Binary Tree
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27. Validate Binary Search Tree
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28. Symmetric Tree
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29. Lowest Common Ancestor of a Binary Search Tree
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30. Number of Islands
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31. Flood Fill
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32. Course Schedule
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33. Climbing Stairs
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34. House Robber
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35. Coin Change
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36. Word Break
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37. Unique Paths
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38. Implement Queue using Stacks
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39. Min Stack
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40. LRU Cache
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41. Kth Largest Element in an Array
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42. Top K Frequent Elements
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43. Rotate Array
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44. Spiral Matrix
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45. Design an ATM Machine
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46. Design a Bank Account Management System
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47. Detect Cycle in a Directed Graph
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48. Find the Longest Common Subsequence
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49. Find the Kth Smallest Element in an Unsorted Array
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50. Check for Balanced Parentheses in an Expression
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51. Boundary Traversal of a Binary Tree
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52. Job Sequencing Problem
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