---

You are working on a database that must be functioning 24 hours a day， 7 days a week. The database isconfigured 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

---

出自：Oracle认证

显示答案