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 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 Pc.P is false but Q is trued.Both P and Q are false
Question
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 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 Pc.P is false but Q is trued.Both P and Q are false
Solution
To determine the truth of statements P and Q and their relationship, let's analyze each statement individually and then consider their connection.
Statement P: "Increasing the number of page frames allocated to a process sometimes increases the page fault rate."
This statement refers to a phenomenon known as Belady's Anomaly, which can occur in certain page replacement algorithms like FIFO. Belady's Anomaly is a counterintuitive situation where increasing the number of page frames results in an increase in the number of page faults. Therefore, statement P is true.
Statement Q: "Some programs do not exhibit locality of reference."
Locality of reference is a property where a program tends to access a relatively small portion of its address space at any given time. However, not all programs exhibit this behavior. Some programs may have access patterns that are more random or spread out, meaning they do not exhibit strong locality of reference. Therefore, statement Q is true.
Relationship between P and Q
While both statements P and Q are true, Q is not the reason for P. Belady's Anomaly (statement P) is a specific characteristic of the FIFO page replacement algorithm and is not directly caused by whether a program exhibits locality of reference or not (statement Q). Therefore, Q is not the reason for P.
Conclusion
The correct answer is:
b. Both P and Q are true, but Q is not the reason for P
Similar Questions
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