In progressTechnical Screen

An OA and a Mean-versus-Median Estimation Interview

Hudson River TradingData Scientist · Technical Screen · Sep 2026

I recently finished HRT's OA and first Zoom interview. Sharing the questions here—hope this helps people interviewing later! OA I received the coding OA invitation a few days ago and finished it today. There were three questions: Fancy Number A fancy number is a number that contains only 0 and 1 when written in base 4. Given n, return the count of fancy numbers smaller than n. This probably needs…

Shared by a candidate · reported Sep 2026. Interview formats change; use it as a guide, not a script.