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What is data leakage?

  1. A Information unavailable at prediction time influencing training
  2. B Sensitive data being exposed publicly
  3. C Memory not being freed
  4. D Losing rows during a join
Answer

Information unavailable at prediction time influencing training

It produces excellent validation scores and a model that fails in production, and is the most common serious mistake in applied ML.

All Machine Learning MCQs

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