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Detailed Explanation: The Optimal Page Replacement Algorithm replaces the page that will not be used for the longest time in the future. It minimizes page faults by making the most informed decision possible based on future knowledge of the reference string. While ideal in theory, it cannot be implemented in practice because predicting future page requests is impossible. However, it is used as a benchmark to evaluate the performance of other page replacement algorithms like LRU and FIFO. This algorithm performs best because it avoids unnecessary page replacements by ensuring only the least critical page is removed. It is particularly useful in environments like simulations or during retrospective analysis of paging behavior. Why Other Options Are Incorrect:
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