单项选择题

How many database instances are used during a database-duplication process？（）

A. One
B. Two
C. Three
D. Four
E. Five

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单项选择题

Which of the following commands will perform an active database duplication of the ORCL database to the ORCL2 database？（）

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

单项选择题

When youre performing active database duplication，a backup of what kind is required？（）

A. A current RMAN backup-set backup is required.
B. No backup is required.
C. An RMAN image backup is required.
D. A manual backup is required.
E. A "duplicate" preparatory backup is required.

单项选择题

Which command is used to begin a tablespace point-in-time recovery？（）

A. Restore tablespace
B. Recover tablespace
C. Tablespace recover
D. Recover to time
E. recover datafile