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Exam Certified Data Engineer Professional topic 1 question 181 discussion

Actual exam question from Databricks's Certified Data Engineer Professional
Question #: 181
Topic #: 1
[All Certified Data Engineer Professional Questions]

A Delta Lake table was created with the below query:



Realizing that the original query had a typographical error, the below code was executed:

ALTER TABLE prod.sales_by_stor RENAME TO prod.sales_by_store

Which result will occur after running the second command?

  • A. The table reference in the metastore is updated.
  • B. All related files and metadata are dropped and recreated in a single ACID transaction.
  • C. The table name change is recorded in the Delta transaction log.
  • D. A new Delta transaction log is created for the renamed table.
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Suggested Answer: A 🗳️
by RandomForest at Jan. 16, 2025, 12:55 p.m.

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Stalker200
1 week, 2 days ago
Selected Answer: A
The Hive Metastore (or Unity Catalog) updates the logical table name. The data and files stay untouched.
upvoted 1 times
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lakime
1 month, 3 weeks ago
Selected Answer: C
while the metastore is updated, the key mechanism for tracking changes in Delta Lake is the transaction log.
upvoted 1 times
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