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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 · Training data pipeline

Design a training data pipeline for a fraud detection model where only 0.1% of transactions are fraudulent. How do you handle class imbalance and ensure the model sees recent fraud patterns?

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Design a training data pipeline for a fraud detection model where only 0.1% of transactions are fraudulent. How do you handle class imbalance and ensure the model sees recent fraud patterns?

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