Which two statements are true about UNDO and REDO? (Choose two.)

A. The generation of UNDO generates REDO

B. DML modifies Oracle database objects and only generates UNDO

C. The generation of REDO generates UNDO

D. DML modifies Oracle database objects and only generates REDO

E. DML modifies Oracle database objects and generates UNDO and REDO

Correct Answer: A,E

https://www.experts-exchange.com/articles/13880/UNDO-AND-REDO-IN-ORACLE.html