单项选择题

Yourdatabaseisconfiguredonnon－ASMdiskstorage.YouneedtomigrateyourdatabasetoASMdiskstorage.Whichstatementistrueaboutmigratingfromnon－ASMdiskstoragetoASMdiskstorage？（）

A.Youcanusetheoperatingsystemutilitytomigratefromnon-ASMdiskstoragetoASMdiskstorage.
B.Youcannotperformadatabasebackupfromnon-ASMdiskstoragetotapeandthenmoveittoASMdiskstorage.
C.YoucanusetheSWITCHDATABASETOCOPYRecoveryManager（RMAN）commandtoswitchbacktonon-ASMdiskstorageifyouhavenotdeletedyouroriginaldatafiles.
D.YoucannotuseRecoveryManager（RMAN）tomigratefromnon-ASMdiskstoragetoASMdiskstorageifyouarenotusingRMANforyourbackupandrecoverystrategies.

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A.ThedatabaseuserCATOWNERownsthebaserecoverycatalog.YouwantanewuserVPC1tohaveaccesstoonlythePROD1databaseandcreateavirtualprivatecatalog.Givenbelowaresomeofthecommandsrequiredtoachievethis：
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E.RMAN>CONNECTCATALOGcatowner/password@catdb；
F.RMAN>CREATEVIRTUALCATALOG；

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WhentuningAutomaticPGAMemoryManagement，whichofthefollowingviewswillprovidetheinformationspecified？（）

A.TheV$PGA_TARGET_ADVICEviewshowsthepredictedcachehit-ratioimprovementifyou
B.TheV$PGA_TARGET_ADVICEviewshowshowtheV$SQL_WORKAREAhistogramwill
C.TheV$PGA_TARGET_ADVICE_HISTOGRAMviewshowshowtheV$SQL_WORKAREA_HISTOGRAM
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