单项选择题
A. Level 1 B. Level 0 C. Level 2 D. Level 3
Whichtypeofbackupbacksuponlydatablocksmodifiedsincethem...
单项选择题Which type of backup backs up only data blocks modified since the most recent backup at the same level or lower？（）
A. Differential incremental backup B. Different incremental backup C. Cumulative backup D. Cumulative incremental backup
Whichisthecorrectcommandtobackupthedatabase，backupthear...
单项选择题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？（）
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
Compressedbackupsworkwithwhichofthefollowingcommands？（）...
单项选择题Compressed backups work with which of the following commands？（）
A. copy as backup B. backup as copy C. backup D. copy
