Which two statements are true about the configuration and use of UNDO RETENTION
With no GUARANTEED
RETENTION?
A.Unexpired UNDO is always retained B.UNDO RETENTION specifies for how long Oracle attempts to keep unexpired UNDO C.UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unexpired UNDO. D.UNDO RETENTION specifies how long all types of UNDO are retained E.Active UNDO is always retained正确答案BE
