Which two statements are true regarding transactions in an Oracle database? (Choose
two.)
A.
Multiple transactions can use the same undo segment.
B.
The transactions use system undo segment to storeundo data if all the segments in
the undo tablespace are used.
C.
A transaction is assigned an undo segment when it is started.
D.
More than one transaction cannot share the same extent in the undotablespace.
A AND C