单项选择题
A.The data files can be recovered till the last committed transaction.
B.The data files can be recovered without shutting down the database.
C.The data file is taken offline automatically； the database remains open.
D.The data files can be recovered to the time of the most recent backup.
单项选择题 You executed the following command to start the database： SQL> STARTUP ORACLE instance started. Total System Global Area 281018368 bytes Fixed Size 789000 bytes Variable Size 229635576 bytes Database Buffers 50331648 bytes Redo Buffers 262144 bytes ORA-00205： error in identifying controlfile， check alert log for more info Which view would you query at this stage to investigate this missing control file？（）
多项选择题 Inyourdatabase，theLogWriter（LGWR）processisunabletowritetoamemberofacurrentredologgroupduetoread/writefailure.Whichtwoeffectswouldyouseeinyourdatabase？（）
多项选择题 WhichthreepiecesofinformationaretobemandatorilyprovidedwhilecreatinganewlistenerusingEnterpriseManagerDatabaseControl？（）