单项选择题

Which one of the following RMAN commands is used to register the database files with repository that were backed up using O/S commands？（）

A.CHANGE
B.CATALOG
C.CROSSCHECK
D.SWITCH

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单项选择题

Which of the following commands must be issued to remove a stored script from the recovery catalog？（）

A.DELETE SCRIPT
B.ERASE SCRIPT
C.REMOVE SCRIPT
D.UNCATALOG SCRIPT

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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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Which Oracle background process frees SGA resources that were allocated to a user process that failed？（）

A.PMON
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C.CKPT
D.LGWR
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