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1:

Consider following page trace :

4,3,2, 1,4,3,5,4,3,2, 1,5

 Number  of page faults that would occur if FIFO page replacement algorithm is used with Number of frames for the Job M=3, will be

A.

8
B.

9
C.

10
D.

12
 

Answer : B

Explanation :

When M-3

T

1

2

3

4

5

6

7

8

9

10

11

12

Page Sequence

4

3

2

1

4

3

5

4

3

2

1

5

Memory

Frame

1st

4

4

4

1

1

1

5

5

5

5

5

5

2nd

 

3

3

3

4

4

4

4

4

4

1

1

3rd

 

 

2

2

2

3

3

3

3

2

2

2

Page fault

y

y

y

y

y

y

y

n

n

y

y

n

Total Page Fault = 9

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Option: A

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