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Interviewers ask this kind of question to surface how you think, not what you remember. The strongest answers are specific, calmly told, and end on what changed.

ML system design · Online/offline gap

Your movie recommendation model has 85% accuracy offline but users aren't clicking the recommendations in production. What are three possible reasons for this gap?

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Your movie recommendation model has 85% accuracy offline but users aren't clicking the recommendations in production. What are three possible reasons for this gap?

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