Question

For 3 page frames, the following is the reference string :

7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1
ii) How many page faults does the FIFO page replacement algorithm produce ?
a) 10
b) 15
c) 11
d) 12

Answer 1

The FIFO algorithm produces 10 page faults.

Step-by-step explanation:

The FIFO (First-In-First-Out) page replacement algorithm works by replacing the oldest page in a page frame when a page fault occurs. In this problem, we have 3 page frames and the reference string given is: 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1.

Now let's simulate the page replacement process using FIFO:

1. 7 (Page Fault)
2. 0 (Page Fault)
3. 1 (Page Fault)
4. 2 (Page Fault)
5. 0 (Page Fault)
6. 3 (Page Fault)
7. 0 (Page Fault)
8. 4 (Page Fault)
9. 2 (Page Fault)
10. 3 (Page Fault)

Therefore, the number of page faults produced by the FIFO algorithm is 10.