Operating system mcqs virtual memory page replacement algorithms

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Operating system mcqs virtual memory page replacement algorithms

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the Optimal page - replacement algorithm?
A
Replace the page that has not been used for a long time
B
Replace the page that has been used for a long time
C
Replace the page that will not be used for a long time
D
None of the mentioned
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Applying the LRU page replacement to the following reference string. 1 2 4 5 2 1 2 4 The main memory can accommodate 3 pages and it already has pages 1 and 2. Page 1 came in before page 2. How many page faults will occur?
A
2
B
3
C
4
D
5
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Users ..... that their processes are running on a paged system.
A
are aware
B
are unaware
C
may unaware
D
none of the mentioned
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A process refers to 5 pages, A, B, C, D, E in the order : A, B, C, D, A, B, E, A, B, C, D, E. If the page replacement algorithm is FIFO, the number of page transfers with an empty internal store of 3 frames is?
A
8
B
10
C
9
D
7
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the reason for using the LFU page replacement algorithm?
A
an actively used page should have a large reference count
B
a less used page has more chances to be used again
C
it is extremely efficient and optimal
D
all of the mentioned
There are 5 questions to complete.

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