单项选择题Which one of the following statements about the TNSPING utility is correct?()

A.It helps you to determine whether or not the Oracle database is running.
B.It requires the username and password to check the connectivity of the service.
C.It does not require the username and password to check the connectivity of the service.
D.It establishes a session with the database and checks the connectivity of the service.


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4.单项选择题Which script must you to query to display the code associated with RMAN stored scripts?()

A.RC_STORED_SCRIPT
B.RC_STORED_SCRIPT_LINE
C.RC_SCRIPTS
D.RC_STORED_LINE_SCRIPT
E.None of the other alternatives apply

8.单项选择题RMAN enables you to open the target database when it is already mounted. Which command must you execute at the RMAN prompt to open the database?()

A.’SQL ALTER DATABASE OPEN’;
B.SQL ALTER DATABASE ’OPEN’;
C.OPEN DATABASE;
D.DATABASE OPEN

9.单项选择题Which of the following commands cannot be executed when the database open?()

A.RECOVER DATABASE
B.RECOVER TABLESPACE
C.RECOVER DATAFILE
D.ALTER DATABASE RECOVER DATAFILE

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