Design an experiment on an internal developer tool
Experiment designHardProblem. You want to test whether a new internal tool (say, a smarter code-review assistant) improves productivity. Design the experiment. What's the right unit, and what breaks?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.