Operating System (3140702) MCQs

MCQs of Memory Management

Showing 61 to 70 out of 85 Questions
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61.
Consider a reference string 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Calculate the number of page faults using optimal page replacement algorithm.
(a) 7
(b) 9
(c) 8
(d) 6
Answer:

Option (c)

62.
Consider a reference string 1,2,3,2,1,5,2,1,6,2,5,6,3,1,3,6,1,2,4,3 of frame size 3. Calculate the number of page faults using optimal page replacement algorithm.
(a) 12
(b) 16
(c) 14
(d) 15
Answer:

Option (c)

63.
In a FIFO algorithm, when a page is to be replaced, which of the following page is chosen?
(a) Oldest page
(b) Newest page
(c) Frequently occurred page in the future
(d) Not frequently occurred page in the future
Answer:

Option (a)

64.
Consider a reference string: 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 3. Using FIFO algorithm, determine the number of page faults.
(a) 12
(b) 16
(c) 14
(d) 15
Answer:

Option (d)

65.
Consider a reference string: 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Using FIFO algorithm, determine the number of page faults.
(a) 12
(b) 16
(c) 10
(d) 14
Answer:

Option (c)

66.
A page fault occurs
(a) when the page is not in the memory
(b) when the page is in the memory
(c) when the process enters the blocked state
(d) when the process is in the ready state
Answer:

Option (a)

67.
Reference bit is used for
(a) implementing LRU page replacement algorithm
(b) implementing NRU algorithm
(c) implementing optimal algorithm
(d) All of the mentioned
Answer:

Option (b)

68.
The LRU algorithm ______
(a) pages out pages that have been used recently
(b) pages out pages that have not been used recently
(c) pages out pages that have been least used recently
(d) pages out the first page in a given area
Answer:

Option (c)

69.
Operating system supports different page replacement policy. From the given below option which is not a valid page replacement policy?
(a) Least Recently Used
(b) First in first out
(c) Round robin
(d) Optimal page replacement policy
Answer:

Option (c)

70.
In which of the following page replacement policies Belady’s anomaly occurs?
(a) Most recently used
(b) LRU
(c) FIFO
(d) Optimal page replacement policy
Answer:

Option (c)

Showing 61 to 70 out of 85 Questions
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