Practice Maintaining Clean Pages In Free Frame Pool (20.3.3) - Belady's Anomaly

Practice: Maintaining Clean Pages in Free Frame Pool

Lesson 20.3.3Belady's Anomaly

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6 sample questions

Question 1.
Define Belady's anomaly.
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Think about scenarios where more options can still lead to issues.
Question 2.
What does FIFO stand for?
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It's a way of prioritizing which items leave first.
3Question 3.
What is Belady's anomaly?
- A: It refers to page faults decreasing with more frames
- B: It is the concept that more frames can sometimes increase page faults
- C: It describes memory fragmentation
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Think back to scenarios where additional resources led to efficiency losses.
4Question 4.
Does the LRU algorithm experience Belady's anomaly?
- True
- False
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Which algorithms are known for their efficiency with recent usage?
Question 5.
A system is currently supporting 5 processes with varying memory demands, each needing 10, 20, fewer than 8, 30, and 12 frames respectively. Based on proportional allocation, how would you divide a total of 80 available frames among these processes?
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Break down each need to determine a fair ratio.
Question 6.
Given a series of page accesses [A, B, C, A, D, B, C, E], demonstrate how both FIFO and LRU algorithms results in different outcomes based on a frame limit of 3.
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Map each function to see which pages are retained under both methods.

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