182.Which of the following files cannot be backed up by RMAN? (Choose all that apply.)
A. Database datafiles
B. Control files
C. Online redo logs
D. Database pfiles
E. Archived redo logs
Answer: CD
答案解析：
参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmcncpt.htm#BRADV89477
C是归档后，使用r满备份。而pfile是客户端的文件，也不能使用rman备份。
The RMAN command for making backups is BACKUP. The RMAN BACKUP command
supports backing up the following types of files:
-
Datafiles and control files
-
Server parameter file
-
Archived redo logs
-
RMAN backups
Although the database depends on other types of files, such as network configuration files, password files, and the contents of the Oracle home, you cannot back up these files with RMAN. Likewise, some features of Oracle Database, such as external tables, may depend upon files other than the datafiles, control files, and redo log. RMAN cannot back up these files. Use some non-RMAN backup solution for any files not in the preceding list.
When you execute the BACKUP command in RMAN, the output is always either one or more backup sets or one or more image copies. A backup
set is an RMAN-specific proprietary format, whereas an image copy is
a bit-for-bit copy of a file. By default, RMAN creates backup sets.