多选题You are managing a 24*7 database. The backup strategy for the database is to perform user-managedbackups.Identify two prerequisites to perform the backups. (Choose two.)（）AThe database must be opened in restricted mode.BThe database must be configured to run in ARCHIVELOG mode.CThe tablespaces are required to be in backup mode before taking the backup.DThe tablespaces are required to be in read-only mode before taking the backup
多选题
You are managing a 24*7 database. The backup strategy for the database is to perform user-managedbackups.Identify two prerequisites to perform the backups. (Choose two.)（）
A
The database must be opened in restricted mode.
B
The database must be configured to run in ARCHIVELOG mode.
C
The tablespaces are required to be in backup mode before taking the backup.
D
The tablespaces are required to be in read-only mode before taking the backup
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