单项选择题
Which RMAN command is used to verify the status of a backup or copy， and also updates the repository when files have been deleted using operating system commands？（）
A.CHANGE B.RESYNC C.CATALOG D.CROSSCHECK
单项选择题 UndertheOracleSharedServerarchitecture，client-userprocessesultimatelyconnecttoa（）
多项选择题 Whichtwoaretrueregardingdirect-pathexports？（）
单项选择题 TheLogWriter（LGWR）processreadsinformationfromthe（）andwritesittotheonlinelogs.
