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Tower Research Capital DSA Interview Questions

Preparing for Tower Research Capital's SDE or Quant Developer interview in 2026? This is the DSA sheet you need. Tower Research runs some of the toughest algorithmic rounds in the industry — expect deep dives into competitive-programming-style problems, bit manipulation, greedy proofs, advanced data structures, and math-heavy optimization, since every millisecond matters in a low-latency trading engine. This sheet curates 58 of the most frequently reported Tower Research interview questions from LeetCode and GeeksforGeeks, organized by pattern — arrays, DP, graphs, heaps, segment trees, and number theory — with real candidate-reported difficulty and popularity tags. Skip the guesswork, focus on what Tower Research actually asks, and walk into your interview with a genuine edge.

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1. Two Sum
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2. Maximum Subarray
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Hot
3. Sliding Window Maximum
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4. Trapping Rain Water
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Hot
5. Median of Two Sorted Arrays
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Very Hot
6. Find Median from Data Stream
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Hot
7. Sliding Window Median
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Hot
8. Kth Largest Element in an Array
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9. Merge k Sorted Lists
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Warm
10. Longest Increasing Subsequence
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Hot
11. Russian Doll Envelopes
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Warm
12. Best Time to Buy and Sell Stock III
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13. Best Time to Buy and Sell Stock with Cooldown
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14. Maximum Profit in Job Scheduling
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15. Coin Change
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Warm
16. Partition Equal Subset Sum
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Warm
17. Edit Distance
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18. Regular Expression Matching
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Warm
19. Wildcard Matching
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Warm
20. Number of Islands
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21. Network Delay Time
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Hot
22. Cheapest Flights Within K Stops
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23. Course Schedule II
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Warm
24. Redundant Connection
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Warm
25. Number of Connected Components in an Undirected Graph
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Warm
26. Range Sum Query - Mutable
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Hot
27. Count of Smaller Numbers After Self
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Hot
28. The Skyline Problem
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Warm
29. Basic Calculator
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Warm
30. Single Number II
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Warm
31. Sum of Two Integers
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Warm
32. Counting Bits
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Warm
33. Maximum XOR of Two Numbers in an Array
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Hot
34. Pow(x, n)
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Warm
35. Sqrt(x)
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36. Fraction to Recurring Decimal
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Warm
37. Random Pick with Weight
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Hot
38. Search a 2D Matrix II
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Warm
39. Split Array Largest Sum
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40. Task Scheduler
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41. Gas Station
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42. Jump Game II
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43. Meeting Rooms II
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44. Design a Stack With Increment Operation
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45. LFU Cache
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46. Design Twitter
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47. Word Ladder
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48. Longest Consecutive Sequence
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49. Minimum Spanning Tree (Kruskal's Algorithm)
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Hot
50. Dijkstra's Shortest Path Algorithm
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51. Segment Tree for Range Minimum Query
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52. Fenwick Tree (Binary Indexed Tree)
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Warm
53. Sieve of Eratosthenes
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54. Modular Exponentiation
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55. Maximum Sum Rectangle in a 2D Matrix
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Warm
56. Job Sequencing Problem
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Warm
57. Order Book Matching Engine Simulation
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58. LCA in a Binary Tree using Binary Lifting
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Warm