Optimal Replacement Policy MCQ Quiz in हिन्दी - Objective Question with Answer for Optimal Replacement Policy - मुफ्त [PDF] डाउनलोड करें

The correct answer is Optimal

Key Points

• Optimal Page Replacement Algorithm: ✅ The Optimal page replacement algorithm replaces the page that will not be used for the longest period of time in the future. This algorithm requires knowledge of future page references, which makes it ideal in theoretical scenarios but impractical in real-world systems since it relies on "futuristic information".
• FIFO (First-In-First-Out): ❌ This algorithm replaces the oldest page in memory (the page that has been in memory the longest). It does not require futuristic information.
• LRU (Least Recently Used): ❌ This algorithm replaces the page that has not been used for the longest period in the past. It uses past information, not futuristic information.
• Second Chance: ❌ This is a variation of the FIFO algorithm that gives a second chance to pages that have been used recently. It does not require futuristic information.

Additional Information

• While the Optimal page replacement algorithm is theoretically the best in terms of minimizing page faults, it is not practical for real-world systems because it requires exact knowledge of future memory accesses.
• In practical systems, algorithms such as LRU or Second Chance are commonly used as they rely on past behavior to predict future behavior instead of requiring exact future knowledge.