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Exam Certified Data Engineer Professional All Questions

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Exam Certified Data Engineer Professional topic 1 question 165 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 165
Topic #: 1
[All Certified Data Engineer Professional Questions]

The data governance team is reviewing code used for deleting records for compliance with GDPR. The following logic has been implemented to propagate delete requests from the user_lookup table to the user_aggregates table.



Assuming that user_id is a unique identifying key and that all users that have requested deletion have been removed from the user_lookup table, which statement describes whether successfully executing the above logic guarantees that the records to be deleted from the user_aggregates table are no longer accessible and why?

  • A. No; the Delta Lake DELETE command only provides ACID guarantees when combined with the MERGE INTO command.
  • B. No; files containing deleted records may still be accessible with time travel until a VACUUM command is used to remove invalidated data files.
  • C. No; the change data feed only tracks inserts and updates, not deleted records.
  • D. Yes; Delta Lake ACID guarantees provide assurance that the DELETE command succeeded fully and permanently purged these records.
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Suggested Answer: B 🗳️
by imatheushenrique at June 1, 2024, 3:45 a.m.

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m79590530
1 month ago
Selected Answer: B
Default Delta Lake time travel retention is 7 days so records deleted are still accessible via previous table versions up to 7 days later unless somebody changes this default setting to less days and runs VACUUM on the table earlier.
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imatheushenrique
5 months, 3 weeks ago
B. No; files containing deleted records may still be accessible with time travel until a VACUUM command is used to remove invalidated data files.
upvoted 3 times
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