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You are working on a 24x7 （available 24 hours per day， 7 days per week） production database. An operating system （OS） user deletes the alert log file accidentally. Which statement in this scenario is true？（）
A:The database crashes.
B:The DBA needs to re-create the file.
C:The file gets re-created automatically.
D:The file gets restored automatically from the last backup.
E:The DBA needs to perform a complete database recovery.
F:The DBA needs to perform an incomplete database recovery.

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出自：Oracle认证

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