---

You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） to perform backups in your databases. Which four backup operations can be performed using RMAN？（）
A:A backup of the target database when it is mounted
B:A backup of online redo log files when the database is open
C:A backup of only used data blocks in the file beingbeingbackup up
D:A backup of online， read/write data files when the database is open
E:A backup of only those data blocks that have changed since a previous backup
F:A backup of online， read/write data files when the database is in the NOMOUNT state.

---

出自：Oracle认证

显示答案