单项选择题
A. The command fails because you cannot configure a redundancy-based retention policy when backup optimization is enabled
B. Backup optimization is performed， but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up
C. Backup optimization is permanently disabled
D. Backup optimization is temporarily disabled because a redundancy-based retention policy is specified
单项选择题 You perform a backup using the following BACKUP command： RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE； Which statement is true of this command？（）
单项选择题 Whichdependentobjectwillgetinvalidatedevenifitisnotaffectedbythetableedefinition？（）
多项选择题 YouinstalledOracleDatabase11gafresh.Whichstatementsaretrueregardingthedefaultauditsettingsinthisdatabase？（）