Tech Screening

Experiment interference

A marketplace experiment changes behavior for treated and untreated users. Why can user-level randomization produce a biased estimate?

What this task practices

Experiment interference is a tech screening interview exercise that trains prompt interpretation, explicit assumptions, a concrete response, and a clear explanation of tradeoffs. The catalog marks it as hard difficulty. It focuses on Validation, Estimation, Technical Reasoning. The signed-in workspace provides the tools for the round and evaluates the attempt against task-specific criteria. Reference solutions, hidden checks, evaluator instructions, and candidate work remain private.