You are performing backup and recovery operations by using RMAN. You are using a recovery catalog for the RMAN repository. You are planning to migrate to ASM disk storage to enable new disks to be added to the database without shutting down the database.  
Which information is NOT required during the migration process？（）

单项选择题YouaretheDatabaseAdministratorforWonderWeb，whichhasrecentlyacquiredamediacompanyTXGlobal.YouhavebeenassignedthetasktomigrateallthedatabaseapplicationsofTXGlobaltothedatabaseserverofWonderWeb.Toaccommodatemoredatabaseapplications，youneedtoadddiskstotheexistingdiskgroup.Wheneveryouaddorremovedisksfromthediskgroup，AutomaticStorageManagement（ASM）rebalancingdistributesthedataevenlyacrossallthedisksofthediskgroup.Whichbackgroundprocessperformsthisactualrebalancingactivity，resultinginthemovementofdataextentsinthediskgroups？（）

A. ASMB
B. ARBn
C. RBAL in the ASM instance
D. RBAL in the database instance

单项选择题Consider the following configuration：   devices diskP1 is a member of disk group grp1.        devices diskP2 is a member of disk group grp1.        devices diskP3 is a member of disk group grp1.        devices diskP4 is a candidate disk.        devices diskQ1 is a member of disk group grp2.        devices diskQ2 is a member of disk group grp2.        devices diskQ3 is a member of disk group grp2.        devices diskQ4 is a candidate disk.   Which command will add the disk  devices diskP4 to the disk group， grp1？（）

A. ALTER DISKGROUP grp1  ADD DISK ’/devices/diskP1’，  ADD DISK ’/devices/diskP4’；
B. ALTER DISKGROUP grp1  ADD DISK ’/devices/disk*4’；
C. ALTER DISKGROUP grp1  ADD DISK ’/devices/diskP*’；
D. ALTER DISKGROUP grp1  ADD DISK ’/devices/diskQ*’，  ADD DISK ’/devices/diskP*’；

单项选择题YouaremaintainingtheSALESdatabaseonOracle10g.Youhaveaddedanewdisktoadiskgroup.AutomaticStorageManagementperformstherebalancingactivity.Youwanttospeeduptherebalancingactivity.Whichparameterwillyouspecifytocontrolthespeedoftherebalancingactivity？（）

A. ASM_POWER_LIMIT
B. ASM_DISKSTRING
C. ASM_DISKGROUPS
D. LARGE_POOL_SIZE

单项选择题WhichstatementwillNOTcreateatablespace？（）

A. CREATE TABLESPACE DATA1 DATAFILE ’+grp1/abc（datafile）’；
B. CREATE TABLESPACE DATA1 DATAFILE ’+grp1’；
C. CREATE TABLESPACE DATA1 DATAFILE ’+data1（tempfile）’；
D. CREATE TABLESPACE DATA1 DATAFILE ’+grp1.256.34359’；

单项选择题YouaremaintainingyourdatabaseinOracle10g.YousetthevalueoftheUNDO_RETENTIONinitializationparametertozerointheinitializationparameterfile.Whatwillbetheimpactofspecifyingthissetting？（）

A. The database will not start.
B. The database will start but will not retain the undo data in the undo segment.
C. The database will start， and the undo segment will contain the undo data for at least one hour.
D. The database will start， and the undo segment will retain the undo data for at least 15 minutes.