多选题Which three statements are true about Flashback Database?（）AFlashback logs are written sequentially, and are archived.BFlashback Database uses a restored control file to recover a database.CThe Oracle database automatically creates, deletes, and reside
题目
多选题
Which three statements are true about Flashback Database?（）
A
Flashback logs are written sequentially, and are archived.
B
Flashback Database uses a restored control file to recover a database.
C
The Oracle database automatically creates, deletes, and resides flashback logs in the Fast RecoveryArea.
D
Flashback Database can recover a database to the state that it was in before a reset logs operation.
E
Flashback Database can recover a data file that was dropped during the span of time of the flashback.
F
Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.