View the Exhibit and examine the output.
You execute the following RMAN command to perform the backup operation:

What is the multiplexing level in the preceding backup process（）

单项选择题You want to configure the Flashback Database feature and retain flashback logs for three days. Presently the database is open and configured in ARCHIVELOG mode.The following steps must be performed in the correct sequence to do this: Choose the correct sequence.（）

A. 4, 1, 3, 2, 5
B. 4, 3, 1, 2, 5
C. 2, 4, 3, 5, 1
D. 4, 2, 5, 3, 1

多项选择题Which two commands never trigger an implicit rebalancing within the disk group?（）

A. ALTER DISKGROUP misc MOUNT;
B. ALTER DISKGROUP misc DROP DISK misc2;
C. ALTER DISKGROUP misc CHECK ALL NOREPAIR;
D. ALTER DISKGROUP misc RESIZE ALL SIZE 1023m;
E. ALTER DISKGROUP dgroupA ADD DISK '/devices/A*';

多项选择题Indentify two advantages of using recovery catalog instead of the control file of the database in Recovery Manager (RMAN)？（）

A. You can use RMAN stored scripts
B. Recovery is faster if data is stored in catalog in addition to the control file
C. You can store backup information of all registered databases in one place
D. Database backups are automatically deleted when they are older than the specified time period

单项选择题The database is currently open and the temp03.dbf tempfile belonging to the default temporary tablespace TEMP has been corrupted. What steps should you take to recover from this tempfile loss in an efficient manner?（）

A. Allow the database to continue running, drop the TEMP tablespace, and then re-create it with new tempfiles
B. Shut down the database, restore and recover the tempfile from backup, and then open the database with RESETLOGS
C. Allow the database to continue running, take the TEMP tablespace offline, drop the missing tempfile, and then create a new tempfile
D. Allow the database to continue running, add a new tempfile to TEMP tablespace with a new name, and drop the tempfile that has been corrupted.

单项选择题The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance. Which statement is true while performing a tape backup in an RMAN session?（）

A. The tape I/O performed is asynchronous
B. The tape buffer is allocated from the System Global Area (SGA)
C. The tape buffer is allocated from the Program Global Area (PGA)
D. Oracle I/O uses an interrupt mechanism to determine when each I/O completes