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Afterperformingacleanshutdownofthedatabaseinstanceformaintenance,youmountthedatabaseandthenexecuteacommandtoopenthedatabase:SQL>ALTERDATABASEOPEN;Whichtwostatementsaretrue()
A.Theonlineredologfilesandonlinedatafilesareopened.
B.Alltheonlinedatafileheadersarecheckedforconsistency.
C.Instancerecoveryisperformedbeforeopeningthedatabase.
D.Thepathandexistenceofallthelogfilemembersarechecked
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