单项选择题

YoucreateadatablockbasedonarelationtablecontainingaREFcolumn.YouselecttheREFcolumnforyourformmodule.WhichstatementabouttheREFcolumnistrue?（）

A.Itiscreatedasanondisplayitem.
B.TheLockRecordpropertyissettoYes.
C.Itcannotbereferencedinitemleveltriggers.
D.Itisplacedonthecanvaswiththehighestsequencenumber.
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单项选择题
Youhavealistenerprocess，L1，currentlylisteningfortheconnectionstothePRODandADMINdatabases.Youcreateanewdatabase，PAY，usingCREATEDATABASE..command.Youhavenotenableddynamicinstanceregistration.YoumodifiedtheLISTENER.ORAfilemanuallytoincludePAYdatabaseforL1listenerprocess.WhichcommandofListenercontrolutility（LSNRCTL）wouldyouusetoenableL1processtostartlisteningfortheconnectionstothePAYdatabasewithoutdisruptinganyexistingdatabasecommunications？（）A.STARTB.RELOADC.RESTARTD.REFRESHE.STARTL1F.RELOADL1G.RESTARTL1H.REFRESHL1
A.Youcreateanewdatabase，PAY，usingCREATEDATABASE..command.Youhavenotenableddynamicinstanceregistration.YoumodifiedtheLISTENER.ORAfilemanuallytoincludePAYdatabaseforL1listenerprocess.WhichcommandofListenercontrolutility（LSNRCTL）wouldyouusetoenableL1processtostartlisteningfortheconnectionstothePAYdatabasewithoutdisruptinganyexistingdatabasecommunications？（）
A.START
B.RELOAD
C.RESTART
D.REFRESH
E.STARTL1
F.RELOADL1
G.RESTARTL1
H.REFRESHL1
单项选择题
YouareworkingasaDBAonthedecisionsupportsystem.Thereisabusinessrequirementtotrackandstorealltransactionsforatleastthreeyearsforafewtablesinthedatabase.Automaticundomanagementisenabledinthedatabase.Whichconfigurationshouldyouusetoaccomplishthistask？（）A.EnableFlashbackDataArchiveforthetables.B.Specifyundoretentionguaranteeforthedatabase.C.Enablesupplementalloggingforthedatabase.D.QueryV$UNDOSTATtodeterminetheamountofundothatwillbegeneratedandcreateanundo tablespaceforthatsize.E.CreateFlashbackDataArchiveonthetablespaceonwhichthetablesarestored.
A.Thereisabusinessrequirementtotrackandstorealltransactionsforatleastthreeyearsforafewtablesinthedatabase.Automaticundomanagementisenabledinthedatabase.Whichconfigurationshouldyouusetoaccomplishthistask？（）
A.EnableFlashbackDataArchiveforthetables.
B.Specifyundoretentionguaranteeforthedatabase.
C.Enablesupplementalloggingforthedatabase.
D.QueryV$UNDOSTATtodeterminetheamountofundothatwillbegeneratedandcreateanundo
E.
F.CreateFlashbackDataArchiveonthetablespaceonwhichthetablesarestored.
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