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Hudson River Trading interview questions

44 questions27 coding1 system design16 behavioral8 freeUpdated

This is every question in the Hudson River Trading guide, in one list: 27 coding problems, 1 system design and 16 behavioral questions, drawn from what candidates report about Hudson River Trading interviews.

Each row shows the round it comes from and links to the lesson that works through it. 8 are free to read in full. The other 36 are Premium, and here you still see their round, difficulty and topic, so you know what you're walking into.

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Hudson River Trading coding interview questions

27 problems, in the order the guide teaches them. The 3 tagged OA are covered in the online assessment lessons. Each lesson gives the full problem, a worked solution and the follow-ups interviewers tend to add.

1Source Length Without CommentsFreeOAMediumThe Online Assessment
2Axis-Aligned Squares From a Point SetFreeOAMediumThe Online Assessment
3Spreading Failure Across a GridFreeOAMediumThe Online Assessment
4Buffered Reader Over a Chunked SourceFreeCodingHardMachine Coding
5Indexable Deque With O(1) OperationsFreeCodingHardMachine Coding
6Local Minimum in a SequenceFreeCodingMediumMachine Coding
7Single-Server Reactor QueueFreeCodingMediumMachine Coding
8Premium medium problemCodingMediumStep-by-Step Simulations
9Premium medium problemCodingMediumStep-by-Step Simulations
10Premium medium problemCodingMediumStep-by-Step Simulations
11Premium easy problemCodingEasyParsing and Formatting Text
12Premium hard problemCodingHardParsing and Formatting Text
13Premium easy problemCodingEasyParsing and Formatting Text
14Premium medium problemCodingMediumParsing and Formatting Text
15Premium hard problemCodingHardParsing and Formatting Text
16Premium medium problemCodingMediumBuilding Your Own Containers
17Premium medium problemCodingMediumBuilding Your Own Containers
18Premium hard problemCodingHardBuilding Your Own Containers
19Premium medium problemCodingMediumBuilding Your Own Containers
20Premium medium problemCodingMediumArrays, Points and Grids
21Premium medium problemCodingMediumArrays, Points and Grids
22Premium medium problemCodingMediumArrays, Points and Grids
23Premium medium problemCodingMediumArrays, Points and Grids
24Premium easy problemCodingEasyMath and Search Puzzles
25Premium medium problemCodingMediumMath and Search Puzzles
26Premium hard problemCodingHardMath and Search Puzzles
27Premium hard problemCodingHardMath and Search Puzzles

Hudson River Trading system design interview questions

1 design, worked end to end in its own lesson, from requirements to the architecture and its trade-offs.

#Question
1Design a Low-Latency Market Data SystemFree

Hudson River Trading behavioral interview questions

16 questions, grouped by what the interviewer is testing. The lesson explains why each one gets asked and what a strong answer covers.

Technical curiosity and depth (3)

All 3 are Premium

Low-ego collaboration and teachability (3)

All 3 are Premium

Ownership and being wrong (3)

All 3 are Premium

Communication on a hard problem (3)

All 3 are Premium

Why HRT and the engineering-and-markets pull (4)

All 4 are Premium

Read the Hudson River Trading behavioral questions

See all 44 Hudson River Trading questions by name

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Common questions

How many questions are in the Hudson River Trading interview guide?

44: 27 coding problems, 1 system design and 16 behavioral questions. The guide was last updated in November 2026.

Which rounds do these Hudson River Trading interview questions come from?

Of the 27 coding problems, 3 come from the online assessment and 24 from the coding rounds. The one system design and 16 behavioral questions come from the system design and behavioral rounds. Every row in the list carries its round, so you can start with the one you have booked.

Which Hudson River Trading interview questions are free?

8 of the 44 are free to read in full, marked Free in the list. The other 36 come with Premium, which also opens all 100 company guides.