Consider a reference string 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Calculate the number of page faults using optimal page replacement algorithm.

Consider a reference string 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of

1.	Consider a reference string 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Calculate the number of page faults using optimal page replacement algorithm.
A.	7
B.	9
C.	8
D.	6
Answer» D.