|Que.||Which of the following is correct?
I. Two phase locking is an optimistic protocol.
II. Two phase locking is pessimistic protocol
III. Time stamping is an optimistic protocol.
IV. Time stamping is pessimistic protocol.
|a.||I and III|
|b.||II and IV|
|c.||I and IV|
|d.||II and III|
|Answer:I and IV|