The DevOps team is automating releases and must split data into train/validation/test without leakage. Which design fits best? split data into train/validation/test without leakage.
Multiple choice — select one answer
Answer choices
Architectural breakdown & explanation
Proper splits prevent optimistic metrics.
Correct answer(s): d. SageMaker Processing or sklearn split with stratification
Exam domain: Domain 1: Data Preparation for Machine Learning (28% weight on the official guide).
Official documentation & study links
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