多项选择题
A. It’s only supported for the backups performed on the tape
B. It is not supported for backup operations that produce image copies
C. Duplex backups need a parallelism for the device to be equal to number of copies
D. Duplex backups can be performed to either disk or tape， but cannot be performed on tape and disk simultaneously
单项选择题 WhichpackageprovidesAPI’sfortheSQLTuningAdvisor？（）
单项选择题 You create two resource plans，one for data warehouse loading jobs at night and the other for application jobs at day time. You want the resource plans to activate automatically so that the resource allocation is optimum as desired by the activity. How would you achieve this？（）
单项选择题 TheDB_BLOCK_CHECKINGinitializationparameterissettoOFF.Whichblockcheckingwouldbeperformed？（）