WhichofthefollowingisavalidwayofputtingatablespacenamedDAVE_TBSintohotbackupmode？（）
A. altertablespaceDAVE_TBSbackupmode
B. altertablespaceDAVE_TBSstartbackup
C. altertablespaceDAVE_TBSbeginbackup
D. altertablespaceDAVE_TBSbackupbegin
E. altertablespaceDAVE_TBSbackup
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Which four are valid Oracle constraint types？ （）
A. CASCADE
B. UNIQUE
C. NONUNIQUE
D. CHECK
E. PRIMARY KEY
F. CONSTANTG. NOT NULL
Youhaveadiskgroup，DGROUP1，withthreedisksandNORMALredundancy.Youexecutethefollowingcommandtocreateatemplateforthediskgroup：ALTERDISKGROUPdgroup1ADDTEMPLATEmy_tempATTRIBUTES（MIRRORFINE）；Whichstatementistrue？（）
A. WhenafileiscreatedinDGROUP1withthetemplate，itwouldhavethree-waymirroring.
B. WhenafileiscreatedinDGROUP1，theMY_TEMPtemplatebecomesthedefaulttemplate.
C. WhenafileiscreatedinDGROUP1withthetemplate，itwouldhavetwo-waymirroringandfilestriping.
D. WhenafileiscreatedinDGROUP1withthetemplate，itwouldhavethree-waymirroringandfilestriping.
E. WhenafileiscreatedinDGROUP1withthetemplate，itwouldhavetwo-waymirroringbutnofileStriping.
WhatwillbetheendresultofthissetofRMANcommands？（）shutdownabortstartupmountrestoredatafile4untiltime，，09/30/2008：15：00：00；recoverdatafile4untiltime，，09/29/2008：15：00：00；alterdatabaseopenresetlogs；
A. Datafile4willberecovereduntil9/30/2008at15：00andthedatabasewillopen.
B. Therestorecommandwillfail.
C. Therecovercommandwillfail.
D. Thealterdatabaseopenresetlogscommandwillfail.
E. Allthesecommandswillfailbecausetheymustbeintheconfinesofarunblock.
YouhavelostallyourRMANbackupsetpiecesduetoadiskfailure.Unfortunately，youhaveanautomatedcross-checkscriptthatalsodoesadeleteexpiredbackupsetcommand.Youhaverestoredallthebackupsetpiecesfromtape.Whatcommandwouldyouusetogetthosebackupsetpiecesregisteredintherecoverycatalogandthecontrolfileofthedatabaseagain？（）
A. registerdatabase
B. recovercatalog
C. loadbackupset
D. synchmetadata
E. catalogstartwith
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