Explanation:Undo erases all the changes and redo makes the deleted changes. 8. Shadow paging has
A. no redo
B. no undo
C. redo but no undo
D. neither redo nor undo
Answer:A
Explanation:Undo erases all the changes and redo makes the deleted changes. 8. Shadow paging has
A. no redo B. no undo C. redo but no undo D. neither redo nor undo
Explanation:Undo erases all the changes and redo makes the deleted changes. 9. For correct behaviour during recovery, undo and redo operation must be