Given the script
create script db_backup_datafile_script
{backup datafile and 1, and2 plus archivelog delete input;}
What is the result of running this command?
Run {execute script db_backup_datafile_script using 2;}
A. The script will fail since you instructed RMAN to back up only one datafile rather than two.
B. The script will successfully back up datafile 3 without error.
C. The script will fail since it uses a substitution variable which is not supported.
D. The execute script command will prompt for the value of and2 since it‘s not included in the command.
E. The script will fail because you cannot use the plus archivelog command when backing up database datafiles.
The script will prompt for the missing substitution variable.The script will return an error if you do not put in a value for the second substitution variable.
原文：http://www.cnblogs.com/Babylon/p/7814133.html