[Solved]-Question 4 Pfr Based Frame Allocation Algorithm Respond Page Fault Rate Low Nothing Low Pf Q37164227

QUESTION 4

1. How does the PFR-based frame allocation algorithm respond tothe page fault rate that is too low?

It does nothing. Having a low PFR is acceptable.

It allocated one or more frames to the process that has the lowPFR.

It returns one or mode frames from the owning process to theoperating system.

It terminates the process that has the low PFR.

QUESTION 5

1. What is the meaning of the first argument of the POSIX functionmmap()? (You may need to read the man page.)

It is the name of the file to be mapped.

It is always a NULL pointer.

It is the address of the new mapping in the virtual addressspace.

It is the handle of the open file to be mapped.

QUESTION 6

1. Rank the following page replacement policies, based on theirexpected average page fault rate. (The highest PFR being #1, thelowest PFR being #4.)

                                        -1.2.3.4.

Least Recently Used

                                        -1.2.3.4.

Belady’s Optimal

                                        -1.2.3.4.

First-In-First-Out

                                        -1.2.3.4.

Clock (“Second chance”)

Expert Answer

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Answer to QUESTION 4 How does the PFR-based frame allocation algorithm respond to the page fault rate that is too low? It does not… . . .