多项选择题

Identify the channel settings that can be performed using the CONFIGURE CHANNEL or ALLOCATE CHANNEL commands in RMAN ？（）

A. Limiting the input/output （I/O） bandwidth consumption
B. Specifying the size of backup sets and backup pieces
C. Specifying vendor-specific information for a media manager
D. Specifying the parallelism for backup and restore operations

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多项选择题

What two are the prerequisites for enabling Flashback Database？（）

A. The database must be in ARCHIVELOG mode
B. The database must be in MOUNT EXCLUSIVE mode
C. The database must be opened in RESTRICTED mode
D. The database instance must be started in the NOMOUNT state
E. The database instance must have the keep buffer pool defined

单项选择题

Which type of backup must be performed first with an incremental backup？（）

A. Level 1
B. Level 0
C. Level 2
D. Level 3

单项选择题

Which type of backup backs up only data blocks modified since the most recent backup at the same level or lower？（）

A. Differential incremental backup
B. Different incremental backup
C. Cumulative backup
D. Cumulative incremental backup