1Z0-052
多选题You are working on a database that must be functioning 24 hours a day， 7 days a week. The databaseis configured in ARCHIVELOG mode. Which two options do you have for performing user-managed backups（）AYou can perform consistent backups only.BYou can pe
题目
多选题
You are working on a database that must be functioning 24 hours a day， 7 days a week. The databaseis configured in ARCHIVELOG mode. Which two options do you have for performing user-managed backups（）
A
You can perform consistent backups only.
B
You can perform a complete database backup without shutting down the database instance.
C
You can back up data files only when all data files have the same SCN recorded in the control file.
D
You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.
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