) If FIFO page replacement is used with five page frames and eight pages, how many page faults will occur with the reference string 236571345157245 if the five frames are initially empty?

There are a total of 8 page faults.

Explanation:

In FIFO page replacement, the requests are executed as they are received. The solution is provided in the attached figure. The steps are as follows

Look for the digit in the pages. if they are available, there is no page fault. If the digit does not exist in the page frames it will result in an error.