单项选择题
A.The target database must be open.
B.The target database must be closed.
C.The target database must be mounted.
D.The target database must be mounted or open.
单项选择题 WhenyouusetheOracleNetConfigurationAssistanttospecifythenamingmethod，whichfileisupdated？（）
单项选择题 WhenissuingtheCROSSCHECKcommandinRMAN，ifabackupfileCANNOTbefound，towhatstatusisthatfileset？（）
单项选择题 YourdatabaseissetinNOARCHIVELOGmodeandisbackedupeverynight.Thereare10redologgroupsonthedatabase，eachwiththreemembers，makingatotalof30redologfiles.Atlunchtimetheserverunexpectedlygetsshutdown.UponrestartingyounoticethatthedatafilebelongingtotheSYSTEMtablespacehasbecomecorrupted.Youalsonoticethattherehavebeen15logswitchesduringtheday.Whichsolutionshouldyouusetorecoverasmuchcommitteddataaspossible？（）