Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Questions  >  A process has been allocated 3 page frames. A... Start Learning for Free
A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?
  • a)
    7
  • b)
    8
  • c)
    9
  • d)
    10
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A process has been allocated 3 page frames. Assume that none of the pa...
Optimal replacement policy looks forward in time to see which frame to replace on a page fault. 1 23    -> 1,2,3 //page faults 173      ->7 143  ->4 153 -> 5 163  -> 6 Total=7
So Answer is A
View all questions of this test
Most Upvoted Answer
A process has been allocated 3 page frames. Assume that none of the pa...
Explanation:

Optimal Page Replacement Policy:
In the optimal page replacement policy, the page that will not be used for the longest period in the future is replaced.

Given Reference String:
1, 2, 1, 3, 7, 4, 5, 6, 3, 1

Initial Page Frames:
Initially, none of the pages of the process are available in memory.

Calculating Page Faults:
1. 1 (Page fault, frame 1)
2. 2 (Page fault, frame 2)
3. 1 (No page fault)
4. 3 (Page fault, frame 3)
5. 7 (Page fault, replace 1)
6. 4 (Page fault, replace 2)
7. 5 (Page fault, replace 3)
8. 6 (Page fault, replace 1)
9. 3 (Page fault, replace 7)
10. 1 (Page fault, replace 4)

Total Page Faults:
Total page faults = 7
Therefore, the number of page faults that occur for the given reference string using the optimal page replacement policy is 7.
Explore Courses for Computer Science Engineering (CSE) exam

Similar Computer Science Engineering (CSE) Doubts

Top Courses for Computer Science Engineering (CSE)

A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer?
Question Description
A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer?.
Solutions for A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE). Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.
Here you can find the meaning of A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer?, a detailed solution for A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?a)7b)8c)9d)10Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
Explore Courses for Computer Science Engineering (CSE) exam

Top Courses for Computer Science Engineering (CSE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev