Design an A/B test for a ranking change — what's the OEC?
Experiment designHardProblem. You're testing a new homepage ranking model. Design the A/B test — unit, metrics, and the Overall Evaluation Criterion.
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.