WhatwillbetheresultofusingtheSQL>DROPUSERSCOTTCASCADE；command？（）
A. Theuser，Scott，isdropped，alltheobjectsinScott’sschemaareplacedintheRecycleBin，andtheobjectsthatarealreadyintheRecycleBinaredropped.
B. Theuser，Scott，isdropped，alltheobjectsinScott’sschemaareplacedintheRecycleBin，andalltheobjectsintheRecycleBin，belongingtotheuserScott，arenotdropped.
C. Theuser，Scott，isdropped，alltheobjectsintheScott’sschemaarenotplacedintheRecycleBin，andtheobjectsintheRecycleBin，belongingtotheuser，Scott，arenotdropped.
D. Theuser，Scott，isdropped，alltheobjectsinScott’sschemaarenotplacedintheRecycleBin，andtheobjectsintheRecycleBinaredropped.
WhatcommandwouldyouusetosetapersistentsettinginRMANsothatbackupsareallwrittentoatapedevice？（）
A. CONFIGUREDEFAULTDEVICETYPETOTAPEMEDIA
B. CONFIGUREDEFAULTDEVICETYPETOTAPE
CONFIGUREDEFAULTDEVICETYPETOSBT
D. CONFIGUREDEFAULTDEVICETYPETOSBT_TAPE
Yourdatabaseisconfiguredinsharedservermode.However，yourseniorDBAasksyoutomodifythevalueofthePRIVATE_SGAlimitintheprofileoftheusers.Whatcouldbethereasonforthis（）
A. tolimittheUserGlobalArea（UGA）memoryallocatedtoasessionfromtheSGA
B. tolimittheamountofmemorytobeusedforthedispatcherqueueofasessioninSGA
C. tolimittheamountofmemorytobeusedfortherequestpoolinSystemGlobalArea（SGA）
D. tocontroltheamountofmemoryallocatedinSGAforthelocalvariablesforeachsharedserverprocess
Whichtwostatementsaretrueregardinglisteners（）
A. ListenersuseonlytheTCP/IPprotocol.
B. Multiplelistenerprocessescanrunsimultaneouslyonahost.
C. Multipledatabaseinstancescanberegisteredwithasinglelistener.
D. Thelistener-relatederrorscanbetracedonlyattheadministrativelevel.
E. Onlyonedatabaseinstancecanberegisteredwithasinglelisteneratanytime.
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