OCP 1Z0 053 32

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32.In your production database, you:
-Are using Recovery Manager (RMAN) with a recovery catalog to perform the backup operation at regular
intervals Set the control file autobackup to "on"
-Are maintaining image copies of the database files
You have lost the server parameter tile (SPFILE) and the control file. Which option must you consider
before restoring the SPFILI: and the control file by using the control file autobackup?
A. setting DBID for the database
B. using the RMAN SWITCH command
C. using the RMAN SWITCH command
D. starting up the database Instance In the NOMOUNT state
Answer: C

题库有误，B C 居然一样了

http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta2020.htm#RCMRF159

Usage Notes

The SWITCH command deletes the RMAN repository records for the data file copy from the recovery catalog and updates the control file records to status DELETED.

If RMAN is connected to a recovery catalog, and if the database is using a control file restored from backup, then SWITCH updates the control file with records of any data files known to the recovery catalog but missing from the control file.

Execute SWITCH ... TO COPY only at the RMAN prompt. Use SWITCH without TO COPY only within a RUN block.

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