Q: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
A Page replacement algorithm is an algorithm that decides which pages should be written to disk or file , when a new page needs to be allocated .
A:
In a computer operating system that uses paging for virtual memory management , page replacement algorithms decide which memory pages to page out , sometimes called swap out , or write to disk , when a page of memory needs to be allocated .