Which of the following is true about the strategy that uses page fault frequency (PFF) to prevent thrashing?
A) A new page is allocated to a process if PFF is too high.
B) A page is deallocated from a process if the PFF is too low.
C) A new process may be swapped in if PFF is too low.
D) All of the above.

Question

Quizplus · Accepted Answer

The strategy that uses Page Fault Frequency (PFF) to prevent thrashing involves adjusting the allocation of pages to a process based on its page fault rate. If the PFF is too high, it indicates that the process needs more pages to work efficiently, so a new page is allocated. Conversely, if the PFF is too low, it suggests that the process has more pages than necessary, leading to the deallocation of a page. Additionally, if the system overall has a low PFF, it might indicate underutilization of resources, allowing for a new process to be swapped in. Thus, all the statements A, B, and C are correct in the context of PFF-based strategies.

Which of the Following Is True About the Strategy That