Three weak signals or one strong one?
Metric designHardProblem. You have three weak detectors: unusual login geography, unusual export volume, and unusual working hours. Each on its own has terrible precision. A colleague wants to build one strong model instead. You think the answer is correlation. Make the case.
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.