Databricks Certified Data Engineer - Associate
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In managing a Delta Lake table within Azure Databricks, you've noticed that the table has accumulated a significant number of deleted files over time, leading to unnecessary storage costs and potential performance degradation. Your team is considering the use of the VACUUM command to address this issue. Given the scenario, which of the following best describes the primary purpose of the VACUUM command and its impact on the table's maintenance? Choose the best option from the four provided.
In managing a Delta Lake table within Azure Databricks, you've noticed that the table has accumulated a significant number of deleted files over time, leading to unnecessary storage costs and potential performance degradation. Your team is considering the use of the VACUUM command to address this issue. Given the scenario, which of the following best describes the primary purpose of the VACUUM command and its impact on the table's maintenance? Choose the best option from the four provided.
Explanation:
The correct answer is D. The VACUUM command in Delta Lake is specifically designed to reclaim storage space by permanently removing files that have been marked as deleted. This process helps in reducing unnecessary storage costs and maintaining the table's efficiency by keeping its size manageable. While options A, B, and C describe actions that can improve table performance or accuracy, they do not accurately represent the primary purpose of the VACUUM command.