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.

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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

单项选择题

tablespace point-in-time recovery is possible only with RMAN.（）

A. True
B. False

单项选择题

If a backup is expired， which of the following is true？（）

A. It can never be used for a restore/recover operation.
B. Oracle will remove the backup set pieces from the flash recovery area.
C. The backup has been used at least once to restore and recover the database.
D. The backup is no longer valid because of a resetlogs operation.
E. The physical backup set pieces are missing from the media.