多项选择题
A.backup pieces
B.control file autobackups
C.copies of all the parameter files
D.trace file generated using BACKUP CONTROLFILE TO TRACE
单项选择题 You enabled the flashback logging feature， but you have not specified the location of the flash recovery area. Which location would be used as the default location for the flash recovery area？（）
单项选择题 Youdecidedtochangethelocationoftheflashrecoveryarea.Youexecutedthefollowingcommand：Whichstatementistrue？（）
单项选择题 You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG What would you determine from the output？（）