单项选择题
A. import the database from the last export
B. restore all the members in the group from the last backup
C. drop the lost member from the database and then add a new member to the group
D. restore all the database files from the backup and then perform a complete recovery
E. restore all the database files from the backup and then perform an incomplete recovery
多项选择题 Youareperformingablockmediarecoveryonthetools01.dbfdatafileintheSALESdatabaseusingRMAN.Whichtwostatementsarecorrectinthisscenario？（）
单项选择题 Oneofthetablespacesisread-onlyinyourdatabase.Thelossofallcontrolfilesforcedyoutore-createthecontrolfile.Whichoperationdoyouneedtoperformafterre-creatingthecontrolfileandopeningthedatabase？（）
单项选择题 Youobservethatadatabaseperformancehasdegradedoveraperiodoftime.Whileinvestigatingthereason，youfindthatthesizeofthedatabasebuffercacheisnotlargeenoughtocachealltheneededdatablocks.Whichadvisorycomponentwouldyoureferto，inordertodeterminethatrequiredsizeofthedatabasebuffercache？（）