Which two features of RMAN would must likely influence your decision to incorporate RMAN into your backup and recover strategy， if your most important requirement is to reduce the time ofrecovery？（）

单项选择题Assume your situation can be described as follows： x A full backup taken using RMAN is available on disk.  x The current control files were NOT damaged and do not need to be restored.  x All data files are damaged or lost.  x The database is in NOARCHIVELOG mode.  Which RMAN command would be most appropriate to use in line 3 of the following RMAN command set to restore and fully recover your database？（） 1. RMAN> STARTUP MOUNT  2. RMAN> RESTORE DATABASE;  3. RMAN> （）  4. RMAN> ALTER DATABASE OPEN;

A.RECOVER DATABASE；
B.SWITCH DATAFILE ALL；
C.RESTORE CONTROL FILE；
D.RECOVER DATABASE USING BACKUP CONTROL FILE；

单项选择题YouwanttocreateanRMANrecoverycatalogintheRC01databasetohelpyoumanagethedatabasesnamedDB01andDB02.Youneedtocreatearecoverycatalogownerinwhichofyourdatabases？（）

A.RCO1 only.
B.DB01 only.
C.DB02 only.
D.DB01 and DB02 only.
E.DB01，DB02，and RC01.

单项选择题Thedatabaseisconfiguredforautomaticarchivelogging.Alongwiththeotherrequiredparameters，thisentryisintheinitializationfile：log_archive_dest2= SERVICE=standby_db1MANDATORYREOPEN=600 Fromwheredoesthedatabaseresolvestandby_db1？（）

A.control file
B.tnsnames.ora
C.data dictionary
D.initialization parameter file

单项选择题RMANautomaticallypropagateinformationaboutthedatabasestructure，archivedredologs，backupsets，anddatafilecopiesintotherecoverycatalogfromthetargetdatabase’scontrolfile.Thisinformationcanalsobepropagatedtothecatalogmanuallybyusingthe（）command.

A.LIST
B.SWITCH
C.VALIDATE
D.CONFIGURE
E.RESYNC CATALOG
F.UPGRADE CATALOG

多项选择题WhichthreefeaturesareprovidedbyRecoveryManagerandNOTprovidedbyuser-managedbackupandrecovery？（）

A.Online backups.
B.Skipping unused block. 
C.Partial database backups.
D.Incremental block-level backup.
E.Detection of corrupted blocks during backup.