单选题What is the net effect of the following command？（） alter diskgroup dgroup1 drop disk abc；A The disk ABC will be dropped from the disk group. Since you did not issue a rebalance command，the data on that disk will be lost.B The command will raise an error indicating that you need to rebalance the disk group to remove the data from that disk prior to dropping the disk.C The disk group will be automatically rebalanced during the drop operation. Once the rebalancing is complete，the disk will be dropped.D This command will fail because you cannot drop a specific disk in an ASM disk group.E The disk drop command will be suspended for a predetermined amount of time，waiting for you to also issue an alter diskgroup rebalance command. Once you have issued the rebalance command，ASM will proceed to rebalance the disk group and then drop the disk.
单选题
What is the net effect of the following command？（） alter diskgroup dgroup1 drop disk abc；
A
The disk ABC will be dropped from the disk group. Since you did not issue a rebalance command，the data on that disk will be lost.
B
The command will raise an error indicating that you need to rebalance the disk group to remove the data from that disk prior to dropping the disk.
C
The disk group will be automatically rebalanced during the drop operation. Once the rebalancing is complete，the disk will be dropped.
D
This command will fail because you cannot drop a specific disk in an ASM disk group.
E
The disk drop command will be suspended for a predetermined amount of time，waiting for you to also issue an alter diskgroup rebalance command. Once you have issued the rebalance command，ASM will proceed to rebalance the disk group and then drop the disk.
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How can you reverse the effects of an ALTER DISKGROUP ... DROP DISK command if it has alreadycompleted?（）A、Issue the ALTER DISKGROUP ... ADD DISK command.B、Issue the ALTER DISKGROUP ... UNDROP DISKS command.C、Issue the ALTER DISKGROUP ... DROP DISK CANCEL command.D、Retrieve the disk from the Recycle Bin after the operation completes
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单选题You issued the following command to mount the DATA disk group in restricted mode： ALTER DISKGROUP data MOUNT RESTRICT； What is the implication of this command？（）A The client RDBMS instance can access the file as a read-only file.B A new disk cannot be added to a disk group.C A disk in a disk group can be taken offline.D The client RDBMS instance cannot access the files in the disk group.
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