Hudson River Trading Interview Questions
All 47 Hudson River Trading questions on file come from Software Engineer candidates, and all 47 were asked in a technical screen, which makes this one of the narrowest company slices on the site. 10 sit under software engineering fundamentals and 7 under coding, but the boundary is thin, because the real subject is implementation under precise constraints. You wrap a reader that only returns fixed-size chunks so callers can request arbitrary lengths. You compute completion times for a single-server reactor queue working through events in order. You split a message into length-limited parts where the numbered suffixes count against the limit, which is the sort of detail that decides whether your answer is right. The array work is equally exacting: the longest common digit prefix across two arrays, counting matrix cells whose row and column neighbours match, minimising an array's amplitude after removing one contiguous block. Nothing here is rated easy. 14 are medium and 5 hard, every question is free to read, 13 have written solutions and 6 open a console.
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