单项选择题

Youwanttheabilitytorecoveryanytimewithinthelastsevendaysandthereforeyouconfiguredtherecoverywindowretentionpolicyusingthecommand：RMAN>CONFIGURERETENTIOHPOLICYTORKCOVFRYWINDOWOF7DAYS；Afterconfiguringtherecoverywindow，youperformedthedatabasebackupasfollows：（）
A.BackupRB1atlogsequencenumber12871on5thJan
B.BackupRB2atlogsequencenumber15622on12thJan
C.BackupRB3atlogsequence16721on15thJan
D.On20thJanwhenthelogsequencenumberwas18112yourealizethatthereIsaneedtoa pointintimeatthebeginningoftherecoverywindow.Youhaveallanhivedredologfilestodate.

A.BackupRB1atlogsequencenumber12871on5thJan
B.BackupRB2atlogsequencenumber15622on12thJan
C.BackupRB3atlogsequence16721on15thJan
D.On20thJanwhenthelogsequencenumberwas18112yourealizethatthereIsaneedtoa
E.Youhaveallanhivedredologfilestodate.

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单项选择题

YoudecidetoenableFlashbackDatabaseinyourOracle10gdatabasesothatfuturerecoverieswilltakelesstimethantraditionalrecoveries.WhichofthefollowingparametersmustbeincludedinyourinitializationparameterfilebeforeenablingFlashbackDatabase？（）A.DB_RECOVERY_FILE_DESTonlyB.DB_FLASHBACK_RETENTION_TARGETonlyC.DB_RECOVERY_FILE_DEST_SIZEandDB_RECOVERY_FILE_DESTonlyD.DB_RECOVERY_FILE_DESTandDB_FLASHBACK_RETENTION_TARGETonlyE.DB_RECOVERY_FILE_DEST_SIZE，DB_RECOVERY_FILE_DESTandF.DB_FLASHBACK_RETENTION_TARGET

A.WhichofthefollowingparametersmustbeincludedinyourinitializationparameterfilebeforeenablingFlashbackDatabase？（）
A.DB_RECOVERY_FILE_DESTonly
B.DB_FLASHBACK_RETENTION_TARGETonly
C.DB_RECOVERY_FILE_DEST_SIZEandDB_RECOVERY_FILE_DESTonly
D.DB_RECOVERY_FILE_DESTandDB_FLASHBACK_RETENTION_TARGETonly
E.DB_RECOVERY_FILE_DEST_SIZE，DB_RECOVERY_FILE_DESTand
F.DB_FLASHBACK_RETENTION_TARGET

未分类题

Youareadatabaseadministratorforyourcompany.ThecompanyusesaSQLServer2005application.Eachnight，dataisimportedintoadatabase，andthedatabaseisthensettoberead-only.Duringbusinesshours，usersrunpredefinedandadhocqueries.Youneedtomonitortheserversperformanceduringtheday.Whataretwopossiblewaystoachievethisgoal？（）A.UsetheLockWaits secperformancecounter.B.UsetheNumberofDeadlocks secperformancecounter.C.UsetheTransactions secperformancecounter.D.UsetheFullScans secperformancecounter.E.UsetheBatches secperformancecounter.