What command would you issue to enable automated backups of control files?
A. alter database controlfile autobackup on
B. alter system controlfile autobackup on
C. configure controlfile autobackup on
D. enable controlfile autobackup
RMAN>show all;
其中会有 CONFIGURE CONTROLFILE AUTOBACKUP OFF;#default
原文：http://www.cnblogs.com/Babylon/p/7814181.html