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.
- df.withWatermark('event_time', '10 minutes') tells Spark how late data can arrive. Data older than (max_event_time - 10 minutes) is treated as late and dropped from stateful aggregations, bounding state size. Critical for correctness in event-time processing.