单项选择题
A. backup database
B. backup database and archivelogs
C. backup database plus archivelogs
D. backup database plus archivelog delete input
E. backup database and archivelog delete input
单项选择题 Compressedbackupsworkwithwhichofthefollowingcommands？（）
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.
单项选择题 WhattypeofbackupisstoredinaproprietaryRMANformat？（）