Question

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

Answer 1

Answer:

The answer is "option B"

Explanation:

Thrashing arises whenever the virtual machine assets of a device are overused, leading to constant paging and page defect, that affects the processing of most programs.  

In the given-question, only choice b is correct because this mechanism can be allocated to avoid the thumping of new pages if PFF is too high by increasing several frames or by removing expulsion frames.

Answer 2

Answer:  

B. A new page is allocated to a process if PFF is too high.

Explanation:

Page fault frequency: In computer science, the term "page fault frequency" is also referred as PFF, and is described as a direct approach that is being utilized to handle thrashing and is considered as the one that tends to use "page-fault frequency concept". However, the problem that is connected with the "thrashing" is the "high-page fault rate" and therefore it is responsible for controlling the "page fault rate". However, if the "page-fault rate" is considerably too high, then it tends to indicate that the process consist of only few frames that is being allocated to it.