（623）You issued the following commands to configure setting in RMAN;

RMAN>CONFIGURE DEVICE TYPE sbt PARALLELISM 1;

RMAN>CONFIGURE DEFAULT DEVICE TYPE TO sbt;

RMAN>CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE sbt TO 2;

RMAN>CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE sbt TO 2;

RMAN>CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2;

Then you issued the following command to take the backup:

RMAN>BACKUP DATABASE PLUS ARCHIVELOG;

Which statement is true about the execution of the above command?

A. The backup will terminate because the FORMAT clause was not configured for the channel

B. It backs up two copies of data files to tape and disk,and two copies of archived log file on tape

C. It backs up the data files and archived log files to disk,making two copies of each data file and archived log file

D. It backs up the data files and archived log files to tape,making two copies of each data file and archived log file

答案：（D）

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Oracle 11G OCP 1Z0-053 623