Data Engineering Associate with Databricks Practice Exam

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Study for the Data Engineering Associate exam with Databricks. Use flashcards and multiple choice questions with hints and explanations. Prepare effectively and confidently for your certification exam!

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Which command would you use for optimizing a Delta table named students?

OPTIMIZE students
REFINE students
UPDATE students
OPTIMIZE TABLE students

The correct answer is: OPTIMIZE students

The command for optimizing a Delta table is designed to enhance the performance of data queries by compacting small files into larger, more efficient files. This process can greatly reduce the overhead of file metadata and improve query speeds. The correct command, OPTIMIZE students, specifically targets the Delta table named 'students' and initiates the optimization process effectively. This command is succinct and directly associated with the functionality needed without excess syntax. Using the command with the keywords like "TABLE" is unnecessary in this context, as the optimized command is already clear and sufficient. Thus, the streamlined version accurately conveys the intent without complicating the syntax. Other choices either do not represent valid SQL or Delta Lake syntax for optimization or pertain to different operations entirely, like updating data or refining which lacks the specificity of file optimization for Delta tables.