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Databricks Certified Data Engineer Associate · Databricks
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- Correct answer : B — `OPTIMIZE`, `VACUUM`, and `ANALYZE`, covering file compaction, stale file cleanup, and statistics collection respectively A . `ZORDER` is a manual clustering technique that is actually incompatible with liquid clustering; it is not one of the three operations predictive optimization automates. B . Predictive optimization automatically runs `OPTIMIZE` for file compaction and incremental clustering, `VACUUM` for removing unreferenced files, and `ANALYZE` for refreshing table statistics. C . `REORG TABLE` and `REPAIR TABLE` are manually invoked commands for specific maintenance tasks; neither is part of the automated set predictive optimization manages. D . `REORG TABLE` is a manually run command used for tasks like type widening, not one of the operations predictive optimization schedules automatically.