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Databricks Certified Data Analyst Associate · Databricks
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- Correct answer : A — The existing partitioning must be removed as part of the migration, since liquid clustering cannot be combined with partitioning or Z-order on the same table A . Liquid clustering is documented as incompatible with both Hive-style partitioning and Z-ordering, so migrating means the team drops the partitioning scheme and stops the Z-order jobs in favor of a `CLUSTER BY` declaration on the columns that matter for their queries. B . Delta Lake does not support running partitioning and liquid clustering on the same table at once, so the two layout strategies cannot be layered together rather than one replacing the other. C . Once a table is declared with `CLUSTER BY`, Z-order compaction is no longer the applicable maintenance operation, so continuing to run `ZORDER BY` jobs would conflict with rather than complement the new clustering configuration. D . Migrating to liquid clustering does not require deleting historical files; existing data can remain in place and be reorganized later through an `OPTIMIZE FULL` operation rather than starting from an empty table.