Computer Science · Database Management Systems
Consider the following statements regarding the Write-Ahead Logging (WAL) Protocol: A. The Undo Rule mandates that the log record containing the old value must be written to disk before the data page is written. B. The Redo Rule requires all log records, including the commit record, to be on disk before the commit is acknowledged. C. Ensuring UNDO is possible on abort requires writing the data page to disk prior to the log record. D. Writing the commit log before acknowledging the commit guarantees that REDO is possible after a crash. Choose the most appropriate answer from the options given below:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A, B and C Only
- 2B, C and D Only
- 3A, B and D Only✓
- 4A, C and D Only
Correct answer
A, B and D Only
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