多项选择题
A.renaming of data files
B.dropping the database user
C.renaming of control files
D.multiplexing of control files
E.configuring the database in ARCHIVELOG mode
多项选择题 YourdatabaseisinNOARCHIVELOGmode.Afterwhichtwooperationsyoushouldtakethebackupofcontrolfile？（）
多项选择题 Auserwantstoconnecttothedatabaseinstancefromanapplicationthatisrunningonaremotemachine.WhichtoolsshouldtheDBAusetoestablishtherequiredconfigurationtoensurethattheuserisabletoconnecttothedatabaseinstance？（）
单项选择题 YoudefineanalerttoberaisedwhentheUSERStablespaceusagehasreached80%ofthetotalspace.Whichareawouldyoureferto，inordertoconfirmthatthealerthasbeenraisedduetheevent？（）