Coach note

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

You're building a spam classifier for email. Walk me through how you'd collect and prepare training data, including how you'd handle the class imbalance between spam and legitimate emails.

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You're building a spam classifier for email. Walk me through how you'd collect and prepare training data, including how you'd handle the class imbalance between spam and legitimate emails.

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