You discover that a disk failure occurred on DISK3 where the data file belonging to the USER_DATA tablespace is stored. The database is currently open and you need to recover the data file. You will restore the data file from the backup on DISK5 to DISK2. 
What is the correct sequence of commands to restore and recover the data file？（）

单项选择题WhenperformingrecoverofadatabaseinNOARCHIVELOGmodewithRMAN，thetargetdatabasemustbeinthe（）statetorestorethecontrolfile.

A.OPEN
B.IDLE
C.MOUNT
D.NOMOUNT

单项选择题Click the Exhibit button and examine the diagram.  You are running a database that takes advantage of features provided by Connection Manager， heterogeneous services， and external procedures. The diagram depicts the components used for the naming method you just configured. Which naming method are you using？（）

A.Host naming method.
B.Local naming method.
C.Directory naming method.
D.External naming method.

单项选择题You experienced a loss of data files in your database. You did not lose any of your control files. You are going to use RMAN to restore and recover the database. Currently， your instance is shut down.  Which sequence of commands is correct to restore and recover your database？（）

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

多项选择题You received this error message because Oracle Net Services cannot locate the connect descriptor specified in the tnsnames.ora configuration file：   ORA_12154： TNS：could not resolve service name Which three actions would be appropriate in helping to resolve the error？（）

A.A
B.B
C.C
D.D
E.E
F.F

单项选择题You have used the CROSSCHECK BACKUP command to verify that the backups recorded in the RMAN repository actually exist.  Which command should you now use to check if any of the files were missing？（）

A.LIST EXPIRED
B.DELETE EXPIRED
C.DELETE OBSOLETE
D.CHANGE UNCATALOG