Which three types of files are backed up by using this …

Your database instance has started using an SPFILE.
Examine the RMAN configuration settings:

You execute the command:
RMAN> BACKUP AS COPY TABLESPACE TEST;
Which three types of files are backed up by using this command?

Your database instance has started using an SPFILE.
Examine the RMAN configuration settings:

You execute the command:
RMAN> BACKUP AS COPY TABLESPACE TEST;
Which three types of files are backed up by using this command?

A.
online redo log files

B.
control file

C.
SPFILE

D.
archived redo log files

E.
data file(s)

F.
PFILE

Explanation:
http://www.juliandyke.com/Research/RMAN/BackupCommand.php