Operating system mcqs virtual memory page replacement algorithms

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Operating system mcqs virtual memory page replacement algorithms

Question 21 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the reason for using the MFU 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
Question 22 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A memory page containing a heavily used variable that was initialized very early and is in constant use is removed, then the page replacement algorithm used is .....
A
LRU
B
LFU
C
FIFO
D
None of the mentioned
Question 23 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If no frames are free, ..... page transfer(s) is/are required.
A
one
B
two
C
three
D
four
Question 24 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A FIFO replacement algorithm associates with each page the .....
A
time it was brought into memory
B
size of the page in memory
C
page after and before it
D
all of the mentioned
Question 25 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a page is selected for replacement, and its modify bit is set .....
A
the page is clean
B
the page has been modified since it was read in from the disk
C
the page is dirty
D
the page has been modified since it was read in from the disk & page is dirty
There are 25 questions to complete.