Final answer:
The page replacement algorithm determines when a page is to be brought into main memory, affecting system performance.
Step-by-step explanation:
The page replacement algorithm determines when a page should be brought into main memory. This mechanism is critical in operating systems that use paging for memory management. The choice of algorithm can greatly affect the efficiency and performance of the system.
Common page replacement algorithms include Least Recently Used (LRU), First-In-First-Out (FIFO), and Optimal Page replacement.
The operating system determines when a page should be brought into main memory. The operating system uses a technique called memory management to allocate and track memory resources. One common memory management scheme is virtual memory, where pages of a program are loaded into main memory as needed.