You used the following command in Recovery Manager （RMAN） as part of the recovery process： RESTORE CONTROLFILE FROM AUTOBACKUP; 
How does RMAN find the control file autobackup？（）

多项选择题In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog and restored the control file by using the following command： RMAN> RESTORE CONTROLFILE  Which two operations do you need to perform after restoring the control file from backup？（）

A.shut down and restart the instance
B.add new tempfiles to the temporary tablespaces after recovery
C.perform a media recovery and open the database with the RESETLOGS option
D.perform a media recovery and bring the database to NOARCHIVELOG mode

单项选择题In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog. The following commands are used in the process of recovering the database by using the backup control file：  In what sequence would you use this process to perform the recovery？（）

A.7， 2， 3， 1， 4， 6， 5
B.7， 1， 3， 2， 6， 5， 4
C.2， 1， 7， 6， 3， 5， 4
D.2， 7， 3， 5， 1， 6， 4

单项选择题The loss of the control file forced you to re­create the control file. After re­creating it and opening the database， you find that some of the data files are named as MISSINGnnnnn， where nnnnn is a five­digit number starting with 0.  What could be the possible reason？（）

A.These are the data files that are corrupted.
B.There is no SYSAUX tablespace in your database
C.There is a read­only tablespace in your database.
D.These are the data files that cannot be recovered.

单项选择题Youhavearead­onlytablespaceonread­onlymedia.Youwanttoperformamediarecoveryontheexistingdatafiles，butusingabackupcontrolfile.Thebackupcontrolfileindicatesthatthestatusoftheread­onlytablespacewasread writewhenthecontrolfilewasbackedup.Whatshouldyouconsider？（）

A.drop the read­only tablespace and re­create the tablespace after recovery
B.take data files from the read­only tablespace offline before performing a recovery
C.perform a recovery; status of the tablespace in control file will be changed automatically
D.recovery using backup control file is not possible， so restore all the files from the last full database backup， and then open the database

单项选择题One of the tablespaces is read­only in your database. The loss of all control files forced you to re­create the control file.  Which operation do you need to perform after re­creating the control file and opening the database？（）

A.drop and re­create the read­only tablespaces
B.rename the read­only data files to their correct file names
C.change the tablespace status from read/write to read­only
D.re­create the read­only tablespace because it is automatically removed