单项选择题
A.back up the control file to trace
B.bring database to the MOUNT state
C.open a connection to the RMAN recovery catalog， which contains the RMAN metadata for the target database
D.set the database ID （DBID）， but only if the DB_NAME parameter associated with the target database is unique in the recovery catalog
多项选择题 You executed the following command in Recovery Manager （RMAN） to perform a backup of the DETTBS tablespace： RMAN> BACKUP TABLESPACE DETTBS Under which conditions would this command execute successfully？ （）
多项选择题 YouhavesetthevalueoftheNLS_TIMESTAMP_TZ_FORMATparameterintheparameterfiletoYYYYMMDD.Thedefaultformatofwhichtwodatatypeswouldbeaffectedbythissetting？（）
单项选择题 Youexecutethefollowingcommandtoenableasessioninresumablemode：SQL>ALTERSESSIONENABLERESUMABLETIMEOUT60Whatistheimpactofatimeoutonthestatementsbeingsuspended？（）