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Exam Certified Data Engineer Professional All Questions

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Exam Certified Data Engineer Professional topic 1 question 160 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 160
Topic #: 1
[All Certified Data Engineer Professional Questions]

A data architect has heard about Delta Lake’s built-in versioning and time travel capabilities. For auditing purposes, they have a requirement to maintain a full record of all valid street addresses as they appear in the customers table.

The architect is interested in implementing a Type 1 table, overwriting existing records with new values and relying on Delta Lake time travel to support long-term auditing. A data engineer on the project feels that a Type 2 table will provide better performance and scalability.

Which piece of information is critical to this decision?

  • A. Data corruption can occur if a query fails in a partially completed state because Type 2 tables require setting multiple fields in a single update.
  • B. Shallow clones can be combined with Type 1 tables to accelerate historic queries for long-term versioning.
  • C. Delta Lake time travel cannot be used to query previous versions of these tables because Type 1 changes modify data files in place.
  • D. Delta Lake time travel does not scale well in cost or latency to provide a long-term versioning solution.
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Suggested Answer: D 🗳️
by hpkr at June 12, 2024, 6:32 p.m.

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hpkr
5 months, 2 weeks ago
Selected Answer: D
correct answer - D
upvoted 3 times
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