RMAN automatically propagate information about the database structure， archived redo logs， backup sets， and data file copies into the recovery catalog from the target database’s control file. This information can also be propagated to the catalog manually by using the （）command.

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.

多项选择题WhichtwoSQL*Loaderinstructionsareusedtoassemblelogicalrecords？（）

A.WHEN
B.INFILE
C.CONTINUEIF
D.CONCATENATE
E.TRAILING NULLCOLS

单项选择题You have discovered that a disk failure occurred on DISK1 where the data files belonging to the SYSTEM and USER_DATA tablespaces is stored. The database is currently open and you need to recover the data files. You will restore the data files to DISK2. What is the correct sequence of RMAN commands to restore and recover the data files？（）

A.A
B.B
C.C
D.D

单项选择题Aftertherecoveryiscomplete，whichcommandshouldyouexecute？（）

A.ALTER DATABASE OPEN；
B.ALTER DATABASE CLEAR LOGFILE；
C.ALTER DATABASE OPEN RESETLOGS；
D.ALTER DATABASE OPEN NORESETLOGS；

单项选择题Whileconnectedtothedatabase，auseronaPCreceivesafatalerrorandthemachinereboots.Whichbackgroundprocesscleansupthefailedconnection？（）

A.ARCn
B.CKPT
C.DBWn
D.LGWR
E.PMON
F.SMON