You issue the RMAN commands: Exhibit: Which three tasks are performed by the BACKUP
DATABASE command?
A.
switching the online redo log file
B.
backing up all data files as image copies and archive log files, and deleting those archive
log files
C.
backing up only the used blocks in the data files
D.
backing up all used and unused blocks in the data files
E.
backing up all archived log files and marking them as obsolete
Explanation: