多项选择题
A.Damaged or lost data files are restored from backups.
B.Redo log file entries are used to roll forward the database.
C.Undo segments are used to roll back any uncommitted transactions.
D.Transactions that were active when the failure occurred are restarted.
E.Transactions that were active when the failure occurred are automatically committed during the recover procedure.
单项选择题 Whenperforminganincompleterecoverofthewholedatabase，whichdatafilesmustyourestore？（）
单项选择题 You execute this command in MOUNT mode： ALTER DATABASE ARCHIVELOG； Where is the information that the database is now in ARCHIVELOG mode stored？（）
单项选择题 You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands： STARTUP MOUNT； BACKUP FORMAT ’/BACKUP/df_%d_%s_%p.bus’ DATABASE filesperset = 2； Which components are included in the backup？（）