Flashcard practice

Multiple Choice Flashcards

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

Question Type

Reader

Answer workspace

Explanation appears after submit

FREE AI FEEDBACK

Why this matters

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

On demand Read aloud

0 Recent saved answers

Recent Databricks Certified Machine Learning Professional Answers

Active recall loop

Answer, inspect the rationale, then repeat.

Large answer targets and a focused review step keep the current Databricks objective at the center of the session.

Answer Review Repeat

Flashcard Practice Databricks Certified Machine Learning Professional Multiple Choice

A production churn Pipeline combines one-hot encoded categorical features with numeric account features. Engineers add StandardScaler after the final VectorAssembler and find that sparse category indicators are being scaled along with continuous values. What is the best redesign?

Choose the Best Answer

Fit StandardScaler separately during scoring so it can see the newest category mix. Remove the categorical features because scaled one-hot vectors are not allowed in Spark ML. Assemble numeric features into their own vector, scale that vector, then assemble it with encoded categorical features. Scale the final `features` vector and rely on the classifier to undo category scaling during fitting.

Load another random question

More

Multiple Choice Flashcards

Question

Choose the Best Answer

How can I help?