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Page replacement algorithms manage memory effectively by deciding which pages to swap out when new pages are needed. Advantages include improved memory utilization and system performance, as they help prevent page faults and ensure that frequently accessed data remains in memory. However, disadvantages include the potential for increased overhead due to the time required to manage page swaps, and the possibility of suboptimal decisions leading to thrashing, where excessive paging significantly degrades system performance. Additionally, some algorithms may favor certain access patterns, making them less effective in diverse workloads.

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