单项选择题
A. Configure backup optimization
B. Configure the channel to increase MAXOPENFILES
C. Configure the channel to increase the capacity with the RATE parameter
D. Configure the channel to adjust the tape buffer size with the BLKSIZE option
多项选择题 Whichthreetaskscanbeperformedusingaduplicatedatabase？（）
单项选择题 Examine the CREATE DISKGROUP command used to create a disk group： SQL> CREATE DISKGROUP misc EXTERNAL REDUNDANCY DISK ’ORCL： FRA3’ NAME misc1， ’ORCL： FRA4’ NAME misc2； In which situation would you use this method of disk group creation？（）
多项选择题 Whichtwostatementsaretrueaboutajobchain？（）