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Multiple Choice Flashcards

Practice multiple choice certification questions for Databricks Certified Machine Learning Professional and review the explanation after each answer.

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Review the keyed rationale after answering so the correct Databricks service choice and each distractor stay connected.

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Answer, inspect the rationale, then repeat.

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Flashcard Practice Databricks Certified Machine Learning Professional Multiple Choice

In production, a Databricks team increases CrossValidator parallelism to speed up model tuning. The run becomes unstable because too many expensive candidates compete for executor memory at once. What is the best adjustment?

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Set parallelism to the maximum possible value because Spark will serialize memory-heavy fits for the team. Disable caching and retry the same parallelism so each fold recomputes features independently. Tune parallelism to cluster capacity and reduce concurrent candidate fits when contention appears. Move the evaluator outside CrossValidator so candidates can run without producing predictions.

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