Which is the correct command to back up the database， back up the archived redo logs， and then remove the backed-up archived redo logs？（）  

单项选择题Compressedbackupsworkwithwhichofthefollowingcommands？（）

A. copy as backup
B. backup as copy
C. backup
D. copy

单项选择题Consider the following command：  Backup database plus archivelog delete input；  How many backup sets would be created by this command if the following were true：（）  Control-file a NN uto backups were enabled.  NN The size of backup sets was not restricted.  NN One channel was allocated.

A. 1
B. 2
C. 3
D. 4
E. 5

单项选择题WhattypeofbackupisstoredinaproprietaryRMANformat？（）

A. Backup set
B. Image copy
C. Backup section
D. Backup group

单项选择题Howisblock-changetrackingenabled？（）

A. With alter database enable block change tracking
B. With alter system enable block change tracking
C. With an init.ora parameter change
D. With an spfile parameter change

多项选择题During recovery， you need to know if log sequence 11 is in the online redo logs， and if so， you need to know the names of the online redo logs so you can apply them during recovery.  Which view or views would you use to determine this information？（）

A. V$LOGFILE
B. V$RECOVER_LOG
C. V$RECOVER_DATABASE
D. V$LOG_RECOVER
E. V$LOG