Correct Answer: C,D,F
A - FALSE
Oracle-generated logs used to perform flashback database operations. The database can only write flashback logs to the fast recovery area. Flashback logs are written sequentially and are not archived. They cannot be backed up to disk.
B - FALSE
If the database control file is restored from backup or re-created, all accumulated flashback log information is discarded. You cannot use FLASHBACK DATABASE to return to a point in time before the restore or re-creation of a control file.
E - FALSE
Flashback Database can only undo changes to a data file made by Oracle Database.
It cannot be used to repair media failures, or to recover from accidental deletion of data files.
http://docs.oracle.com/database/121/BRADV/flashdb.htm#BRADV529
http://docs.oracle.com/database/121/BRADV/glossary.htm#BRADV90169