单项选择题

Compressed backups work with which of the following commands？（）

A. copy as backup
B. backup as copy
C. backup
D. copy

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单项选择题

Consider the following command：
Backup database plus archivelog delete input；
How many backup sets would be created by this command if the following were true：（）
Control-file a NN uto backups were enabled.
NN The size of backup sets was not restricted.
NN One channel was allocated.

A. 1
B. 2
C. 3
D. 4
E. 5

单项选择题

What type of backup is stored in a proprietary RMAN format？（）

A. Backup set
B. Image copy
C. Backup section
D. Backup group

单项选择题

How is block-change tracking enabled？（）

A. With alter database enable block change tracking
B. With alter system enable block change tracking
C. With an init.ora parameter change
D. With an spfile parameter change