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

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Flashcard Practice Databricks Certified Machine Learning Associate Multiple Choice

A production validation job fails because df.summary("count") reports different counts for customer_id and annual_income. The engineer expected both values to equal df.count(). What should they check first?

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Whether summary() randomly samples columns during production runs. Whether annual_income contains nulls or missing values. Whether df.count() was converted to an approximate percentile. Whether customer_id was sorted before summary() ran.

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