单项选择题
A.EXPIRED
B.AVAILABLE
C.UNAVAILABLE
D.ACCESSIBLE
单项选择题 Asaresultofamediafailure，thecurrentonlineredologgroupiscorrupted.Thedatabasecrashes，asthecurrentonlinegroupisinaccessible.Whichtypeofincompleterecoveryareyoumostlikelytoperform？（）
单项选择题 WhichOraclebackgroundprocessisresponsibleforprovidinginformationabouttheinstancenameassociatedwiththeservicehandlersandservicestothelistener？（）
单项选择题 Whichofthefollowingoptionsenablesausertogetauthenticatedthoughasinglepasswordinsteadofusingmultiplepasswords？（）