Which two statements are true about undo segments and the use of undo by transactions in an
Oracle
Database instance
A.A single transaction may use multiple undo segments simultaneously. B.Undo segments can be stored in the SYSAUX tablespace C.Undo segments can extend when a transaction fills the last extent of the undo segment D.Undo segments can wrap around to the first extent when a transaction fills the last extend of the正确答案DE
Undo segment E.Undo segments can be stored in the SYSTEM tablespace
