单项选择题

Which type of database file is spread across all disks in a disk group？（）

A. All types of files are spread across all disks in the disk group.
B. Datafiles
C. Redo log files
D. Archived redo log files
E. Control files

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单项选择题
On the development database rac0， there are six raw devices：  dev raw raw1 through  dev raw raw6.  dev raw raw1 and  dev raw raw2 are 8GB each， and the rest are 6GB each. An existing disk group +DATA1， of NORMAL REDUNDANCY， uses  dev raw raw1 and  dev raw raw2.  Which series of the following commands will drop one of the failure groups for +DATA1， create a new disk group +DATA2 using two of the remaining four raw devices， and then cancel the drop operation from +DATA1？ （）

A.A
B.B
C.C
D.D
单项选择题
Whichbackgroundprocesscoordinatestherebalanceactivityfordiskgroups？（）

A. ORBn
B. OSMB
C. RBAL
D. ASMn
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