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單項(xiàng)選擇題

What feature comes into play to help ensure the completion of the backup should one of three backup devices fail during a backup that is using three different channels?（）

A.Channel failover
B.Restartable backups
C.Rescheduable backups
D.Automatic backup recovery
E.Channel recovery

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單項(xiàng)選擇題

Which dynamic view displays the status of block-change tracking?（）

A.V$BLOCK_CHANGE
B.V$BLOCK_CHANGE_TRACKING
C.V$BLOCKCHANGE
D.V$BLOCK_TRACKING

單項(xiàng)選擇題

Which of the following most closely represents an image copy? （）

A.Unix cp command of a file
B.Bit-by-bit copy of a file
C.Windows COPY command of a file
D.All of the above

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