The document describes the First In First Out (FIFO) page replacement algorithm. As pages 0, 1, 2, 3, 4 are accessed in sequence, they are brought into memory frames. When the fifth page is accessed, page 3 is replaced since it was the first to enter the frames. This process continues with older pages being replaced to make room for new pages.

1. FIFO 0,1,2,3,0,1,4,0,1,2,3,4 1 Page fault 0

2. FIFO 0 ,1,2,3,0,1,4,0,1,2,3,4 2 Page fault 0 1

3. FIFO 0,1 ,2,3,0,1,4,0,1,2,3,4 3 Page fault 0 1 2

4. FIFO 0,1,2 ,3,0,1,4,0,1,2,3,4 4 Page fault 3 1 2

5. FIFO 0,1,2,3 ,0,1,4,0,1,2,3,4 5 Page fault 3 0 2

6. FIFO 0,1,2,3,0 ,1,4,0,1,2,3,4 6 Page fault 3 0 1

7. FIFO 0,1,2,3,0,1 ,4,0,1,2,3,4 7 Page fault 4 0 1

8. FIFO 0,1,2,3,0,1,4, 0,1,2,3,4 There is no page fault here the 0 is already in the frame 7 Page fault 4 0 1

9. FIFO 0,1,2,3,0,1,4,0, 1,2,3,4 There is no page fault here the 1 is already in the frame 7 Page fault 4 0 1

10. FIFO 0,1,2,3,0,1,4,0,1, 2,3,4 8 Page fault 4 2 1

11. FIFO 0,1,2,3,0,1,4,0,1,2 ,3,4 9 Page fault 4 2 3

12. FIFO 0,1,2,3,0,1,4,0,1,2,3, 4 There is no page fault here the 4 is already in the frame 9 Page fault 4 0 1