When you create a backup control file, where is the resulting file written to?
A. The database user dump destination directory
B. The database diagnostic destination directory
C. To $ORACLE_HOME/rdbms
D. To $ORACLE_HOME/admin
E. To the directory and filename you specify in the command
When you issue the alter database backup controlfile to ‘directory/filename‘,
Oracle will write the backup control file to the directory and filename that you choose.
原文：http://www.cnblogs.com/Babylon/p/7792681.html