Question

Consider the following page reference string: A, B, C, D, B, A, E, F, B, A, B, C, G, F, C, B, A, B, C, F Assuming demand paging with four frames, how many page faults would occur when using FIFO replacement algorithm?

Answer 1

The number of page faults using FIFO replacement algorithm with four frames given the specified page reference string results in 15 page faults.

Step-by-step explanation:

The question pertains to a scenario in operating systems which involves calculating the number of page faults that occur using a FIFO (First-In, First-Out) replacement algorithm with a frame size of four.

Following the provided page reference string and FIFO logic, you will find that the first four unique pages (A, B, C, D) cause a page fault as they need to be loaded into the initially empty frames. Subsequent references to these pages do not cause a fault until a new page (E) is introduced, prompting the removal of the first-loaded page (A) according to FIFO, and therefore causing another fault.

Based on this approach and the page reference string provided in the question, you can conclude that a specific number of page faults occur for the series. The tally for this string would be 15 page faults.