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A virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:
P: Increasing the number of page frames allocated to a
process sometimes increases the page fault rate.
Q: Some programs do not exhibit locality of reference.
Which one of the following is TRUE?
process sometimes increases the page fault rate.
Q: Some programs do not exhibit locality of reference.
Which one of the following is TRUE?
- a)Both P and Q are true, and Q is the reason for P
- b)Both P and Q are true, but Q is not the reason for P.
- c)P is false, but Q is true
- d)Both P and Q are false
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
A virtual memory system uses First In First Out (FIFO) page replacemen...
First In First Out Page Replacement Algorithms: This is the simplest page replacement algorithm. In this algorithm, operating system keeps track of all pages in the memory in a queue, oldest page is in the front of the queue. When a page needs to be replaced page in the front of the queue is selected for removal. FIFO Page replacement algorithms suffers from Belady’s anomaly : Belady’s anomaly states that it is possible to have more page faults when increasing the number of page frames.
Solution: Statement P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate. Correct, as FIFO page replacement algorithm suffers from belady’s anomaly which states above statement.
Statement Q: Some programs do not exhibit locality of reference. Correct, Locality often occurs because code contains loops that tend to reference arrays or other data structures by indices. So we can write a program does not contain loop and do not exhibit locality of reference. So, both statement P and Q are correct but Q is not the reason for P as Belady’s Anomaly occurs for some specific patterns of page references.
Most Upvoted Answer
A virtual memory system uses First In First Out (FIFO) page replacemen...
Explanation:
Increasing the number of page frames allocated to a process sometimes increases the page fault rate because with more frames, the process has a higher chance of finding the required page in memory and reducing page faults. However, if the process does not exhibit locality of reference, increasing the number of frames may not necessarily reduce page faults.
Analysis:
- P is true: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.
- Q is true: Some programs do not exhibit locality of reference.
Conclusion:
- Both statements P and Q are true, but Q is not the reason for P. Increasing the number of page frames may or may not reduce page faults for programs that do not exhibit locality of reference. Therefore, option B is the correct answer.
Increasing the number of page frames allocated to a process sometimes increases the page fault rate because with more frames, the process has a higher chance of finding the required page in memory and reducing page faults. However, if the process does not exhibit locality of reference, increasing the number of frames may not necessarily reduce page faults.
Analysis:
- P is true: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.
- Q is true: Some programs do not exhibit locality of reference.
Conclusion:
- Both statements P and Q are true, but Q is not the reason for P. Increasing the number of page frames may or may not reduce page faults for programs that do not exhibit locality of reference. Therefore, option B is the correct answer.
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Community Answer
A virtual memory system uses First In First Out (FIFO) page replacemen...
First In First Out Page Replacement Algorithms: This is the simplest page replacement algorithm. In this algorithm, operating system keeps track of all pages in the memory in a queue, oldest page is in the front of the queue. When a page needs to be replaced page in the front of the queue is selected for removal. FIFO Page replacement algorithms suffers from Belady’s anomaly : Belady’s anomaly states that it is possible to have more page faults when increasing the number of page frames.
Solution: Statement P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate. Correct, as FIFO page replacement algorithm suffers from belady’s anomaly which states above statement.
Statement Q: Some programs do not exhibit locality of reference. Correct, Locality often occurs because code contains loops that tend to reference arrays or other data structures by indices. So we can write a program does not contain loop and do not exhibit locality of reference. So, both statement P and Q are correct but Q is not the reason for P as Belady’s Anomaly occurs for some specific patterns of page references.
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A virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. Can you explain this answer?
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A virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. 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 virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. 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 virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. Can you explain this answer?.
A virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. 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 virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. 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 virtual memory system uses First In First Out (FIFO) page replacement policy and allocates a fixed number of frames to a process. Consider the following statements:P: Increasing the number of page frames allocated to a process sometimes increases the page fault rate.Q: Some programs do not exhibit locality of reference.Which one of the following is TRUE?a)Both P and Q are true, and Q is the reason for Pb)Both P and Q are true, but Q is not the reason for P.c)P is false, but Q is trued)Both P and Q are falseCorrect answer is option 'B'. Can you explain this answer?.
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