单项选择题
A. instance hangs
B. instance gets aborted
C. instance continues running
D. instance gets restarted automatically
单项选择题 Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’.’hh12：mi’）；
多项选择题 Intheparameterfileofyourproductiondatabase，theFAST_START_MTTR_TARGETparameterissetto300tooptimizeinstancerecovery.Whileobservingtheperformanceofthedatabaseduringinstancerecovery，youfindthattheredologfilesarenotsizedproperlytosupportthisactivity.Whichtwosourcescouldyouusetodeterminetheoptimalsizeoftheredologfiles？（）
多项选择题 Younoticedthattheindextablespaceinyourdatabaserequiresarecovery.However，insteadofperformingamediarecovery，youdecidedtore-createtheindexesinanewtablespace.Whichtwooptionswouldyouusetoreducethetimeittakestore-createtheindexes？（）