Preparing Practice Exam…
Please wait a moment while the system generates the exam questions, answers, and study session.
Please wait a moment while the system generates the exam questions, answers, and study session.
Databricks Certified Associate Developer for Apache Spark · Databricks
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
- Overwriting is idempotent: the same input always produces the same final state at the target. Append is NOT idempotent (re-running duplicates rows). collect doesn't modify state but returns data. cache is stateful for the session but idempotent across calls.