The transaction recovery write-ahead-log protocol ensures that transaction logs are always written before any database data are actually updated.

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Quizplus · Accepted Answer

The transaction recovery write-ahead-log protocol (WAL) requires that database changes be first written to the transaction log before the corresponding updates are applied to the database data. This ensures that in case of a system crash or failure, the database can be recovered to a consistent state by replaying the logged updates. Therefore, the statement is true that the transaction logs are always written before any database data are actually updated.

The Transaction Recovery Write-Ahead-Log Protocol Ensures That Transaction Logs Are