Advanced
Big Data & Data Engineering
Q88 / 100
How do table formats like Delta Lake or Iceberg typically implement "time travel" queries?
Correct! Well done.
Incorrect.
The correct answer is A) By maintaining a versioned log of metadata snapshots that map table versions to specific sets of underlying data files
A
Correct Answer
By maintaining a versioned log of metadata snapshots that map table versions to specific sets of underlying data files
Explanation
A transaction log records each commit as a new snapshot referencing specific data files, so querying "as of" a prior version reconstructs the table state from that snapshot.
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