Operating system mcqs virtual memory demand paging

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Operating system mcqs virtual memory demand paging

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When the page fault rate is low .....
A
the turnaround time increases
B
the effective access time increases
C
the effective access time decreases
D
turnaround time & effective access time increases
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The valid - invalid bit, in this case, when valid indicates?
A
the page is not legal
B
the page is illegal
C
the page is in memory
D
the page is not in memory
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If the memory access time is denoted by 'ma' and 'p' is the probability of a page fault (0 <= p <= 1). Then the effective access time for a demand paged memory is .....
A
p x ma + (1-p) x page fault time
B
ma + page fault time
C
(1-p) x ma + p x page fault time
D
none of the mentioned
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ability to execute a program that is only partially in memory has benefits like .....
A
The amount of physical memory cannot put a constraint on the program
B
Programs for an extremely large virtual space can be created
C
Throughput increases
D
All of the mentioned
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Virtual memory is normally implemented by .....
A
demand paging
B
buses
C
virtualization
D
all of the mentioned
There are 5 questions to complete.