单项选择题
A.until the last commit
B.cannot be recovered
C.until the last offline backup
D.until the beginning of the last transaction
单项选择题 Youhavetwodatabases，FINDBandPAYDB，onsingleoperatingsystemandusingOptimalFlexiblearchitecture（OFA）.FINDBisfunctionalandiscurrentlybeingaccessedbytheusers.WhilestartinguptheinstanceforthePAYDBdatabaseyougetthefollowingerror：ORA-01081：cannotstart-alreadyrunningORACLE-shutitdownfirstWhichenvironmentalvariablewouldyousetbeforestartingupthePAYDBdatabasetoovercomethiserror？（）
单项选择题 Youhavebeenaskedtocreatethreeusers，PUB1，PUB2andPUB3，forthreenewlyhiredemployeesandtoallocateunlimitedquotaontheirdefaulttablespacePUBLISHER_TBSwithnootherprivileges.Aftercreatingtheusers，whichmethodcanyouuseforgrantingtherequiredprivileges？（）
单项选择题 Youwanttobenotifiedwhenthespaceusageofanexistingcriticaltablespacehasreached75%oftheallocatedspace.Whichoptionwouldyouusetoachievethis？（）