单项选择题
A. Only one channel is allocated and the backup is created in the flash recovery area
B. Only one channel is allocated and the backup is created in the destination specified for channel
C. Two channels are allocated and backup sets are created in the destinations specified for channels 1 and 2
D. Three channels are allocated and backup sets are created in the destinations specified for channels 1, 2, and FRA
多项选择题 You want to perform an RMAN backup of database as a copy. Which two factors will you consider while performing the backup operation?（）
单项选择题 Your production database is running in archivelog mode and you are using recovery manager (RMAN) with recovery catalog to perform the database backup at regular intervals. When you attempt to restart the database instance after a regular maintenance task on Sunday, the database fails to open displaying the message that the data file belonging to the users tablespace are corrupted. The steps to recover the damaged data files are follows: 1. Mount the database 2. Open the database 3. Recover the data file 4. Restore the data file 5. Make the data file offline 6. Make the data file online Which option identifies the correct sequence that you must use to recover the data files?（）
多项选择题 You executed the following command to drop a user: DROP USER scott CASCADE; Which two statements regarding the above command are correct?（）
