Multiple Choice Flashcards on 01 Databricks Certified Machine Learning Associ...

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Flashcard Practice Databricks Certified Machine Learning Associate Multiple Choice

Why should preprocessing stages such as StringIndexer, OneHotEncoder, and VectorAssembler usually be placed before the learner in the same training Pipeline?

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It stores each category as a separate registered model version. It lets the learner consume raw string columns as numeric features. It makes column dependencies explicit and repeatable during fitting. It makes validation metrics independent of train-test split choices.

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