Data Engineering Associate with Databricks Practice Exam

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Which command is used to restore a Delta table to a specific version?

RECOVER TABLE
RESTORE TABLE
ROLLBACK TABLE
REVERT TABLE

The correct answer is: RESTORE TABLE

The command used to restore a Delta table to a specific version is indeed RESTORE TABLE. This command allows users to roll back to a previous state of the Delta table by specifying the desired version. Delta Lake maintains a version history of all operations performed on the table, enabling users to access data as it existed at different points in time. When using RESTORE TABLE, the user can specify the version or timestamp they want to revert to, making it a powerful tool for data recovery and maintaining consistent data states. This feature is particularly useful in scenarios such as accidental deletions, unexpected data changes, or audits, where you might need to retrieve a previously stable version of your data. The other commands listed do not perform this functionality. While RECOVER TABLE and ROLLBACK TABLE might suggest a form of restoration, they do not directly align with Delta Lake's capabilities for version history recovery, and REVERT TABLE is not a recognized command in the context of Delta tables. Thus, RESTORE TABLE stands as the correct choice for reverting to a specific version of a Delta table.