Which of the following Page Replacement Algorithm suffers from the Belady’s anomaly ?

The correct answer is FIFO.

Key Points

• FIFO (First-In-First-Out) is a page replacement algorithm that suffers from Belady's anomaly.
• Belady's anomaly refers to the counterintuitive situation where increasing the number of page frames results in an increase in the number of page faults.
• In the FIFO algorithm, pages are replaced in the order they arrive, which can lead to suboptimal page replacement decisions.
• Belady's anomaly is not observed in other algorithms like LRU (Least Recently Used) and Optimal Page Replacement.

Additional Information

• LRU (Least Recently Used) algorithm replaces the page that has not been used for the longest period of time. It does not suffer from Belady's anomaly.
• Optimal Page Replacement algorithm replaces the page that will not be used for the longest period of time in the future. It also does not suffer from Belady's anomaly.
• Belady's anomaly occurs because the FIFO algorithm does not take into account the frequency or recency of page accesses.
• Understanding and addressing Belady's anomaly is important for designing efficient memory management systems.