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Exam Certified Data Engineer Associate All Questions

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Exam Certified Data Engineer Associate topic 1 question 139 discussion

Actual exam question from Databricks's Certified Data Engineer Associate
Question #: 139
Topic #: 1
[All Certified Data Engineer Associate Questions]

In a healthcare provider organization using Delta Lake to store electronic health records (EHRs), a data analyst needs to analyze a snapshot of the patient_records table from two weeks ago before some recent data corrections were applied.

What approach should the Data Engineer take to allow the analyst to query that specific prior version?

  • A. Truncate the table to remove all data, then reload the data from two weeks ago into the truncated table for the analyst to query.
  • B. Identify the version number corresponding to two weeks ago from the Delta transaction log, share that version number with the analyst to query using VERSION AS OF syntax, or export that version to a new Delta table for the analyst to query.
  • C. Restore the table to the version from two weeks ago using the RESTORE command, and have the analyst query the restored table.
  • D. Use the VACUUM command to remove all versions of the table older than two weeks, then the analyst can query the remaining version.
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Suggested Answer: B 🗳️
by RandomForest at Oct. 21, 2024, 2:09 p.m.

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RandomForest
1 month ago
Selected Answer: B
B is the only correct answer as we do not want to remove any data.
upvoted 1 times
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