HRHudson River Trading DSA Interview Questions

What Hudson River Trading asks in the DSA round

HRT leans on raw problem-solving over memorised patterns — array and string manipulation, simulation and math-heavy questions, with a strong bar on reasoning about edge cases out loud.

Across the 16 questions on this page, the weight sits on these patterns:

• Bit Manipulation — 2 questions · read the bitwise xor guide
• Greedy — 2 questions · read the greedy guide
• Simulation — 2 questions
• Array — 1 question
• Design — 1 question · read the design data structure guide
• Dynamic Programming — 1 question · read the dynamic programming guide
• Hash Table — 1 question
• Math — 1 question

How to prepare for the Hudson River Trading interview

1. 1. Start at the top of the list above. The patterns are ordered by how often Hudson River Trading uses them, so the first two or three buy you the most coverage per hour.
2. 2. Solve by pattern, not at random. Doing eight bit manipulation problems in a row is what makes the ninth recognisable in an interview — jumping between topics does not.
3. 3. Tick problems off as you go so the gaps are visible. The per-pattern counts tell you which Hudson River Trading topic you have actually covered.
4. 4. Write the approach before the code. Hudson River Trading interviews are judged on the reasoning as much as the working solution.
5. 5. Pair this with the pattern guides when a topic is new, and the system design sheet if the role is senior enough to have that round.
6. 6. If this is a campus or off-campus drive rather than a lateral move, the placement preparation guide covers the stages around the DSA round — aptitude, core subjects and the HR interview — in the order they actually happen.

Hudson River Trading interview questions — FAQ

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