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單項選擇題

You issued the following RMAN command: 
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;    
What is NOT an impact of using the above command?()

A. When a successful backup is recorded in the RMAN repository, then a backup of the current control file is performed.
B. When a structural change is made to the database, then a backup of the current control file is performed.
C. When a successful backup is performed in the RMAN repository, then a backup of the spfile is performed.
D. When a structural change is made to the database, then a backup of the alert log file will be performed.

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