Databricks Data Engineer Associate exam dumps

Databricks Data Engineer Associate practice question 289 of 532

Databricks Certified Data Engineer Associate. Associate level, Databricks. Free question with the correct answer and a full explanation.

Databricks Data Engineer Associate Question 289

Single answer

You are tasked with analyzing historical data from a Delta Lake table named 'sales_data'. A specific version of the table, identified as version 5, contains the data you need. Which of the following commands will allow you to query this specific version of the table?

  1. A

    SELECT * FROM delta./mnt/delta/sales_data VERSION AS OF 5

  2. B

    SELECT * FROM delta./mnt/delta/sales_data TIMESTAMP AS OF '2023-01-01T00:00:00Z'

  3. C

    SELECT * FROM delta./mnt/delta/sales_data VERSION_TIME 5

  4. D

    SELECT * FROM delta./mnt/delta/sales_data VERSION 5

Show answer and explanation

Correct answer: A

Explanation

To query a specific version of a Delta table, you must use the VERSION AS OF clause in the SELECT statement. This allows you to access historical versions of the table stored in Delta Lake.

  • A. Correct.

    Correct. This is the correct syntax to query a specific version of a Delta table using the VERSION AS OF clause.

  • B. Incorrect.

    Incorrect. This syntax is used for querying a Delta table at a specific point in time using TIMESTAMP AS OF, not for querying a specific version.

  • C. Incorrect.

    Incorrect. This syntax is invalid as 'VERSION_TIME' is not a recognized Delta Lake query option.

  • D. Incorrect.

    Incorrect. This syntax is invalid as 'VERSION' without 'AS OF' is not a correct Delta Lake query option.

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More Databricks Data Engineer Associate practice questions

  1. 290.You are working with a Delta table in Databricks which tracks sales transactions. A recent update...
  2. 291.You are working with a Delta table named salesdata in Databricks. A recent update to the table...
  3. 292.You are tasked with querying historical data from a Delta Lake table named 'salesdata'. The table...
  4. 293.You are working with a Delta Lake table containing a large volume of e-commerce transaction data....
  5. 294.A data engineering team is working on optimizing a Delta Lake table used for storing customer...
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