Suppose a memory manager decides which page to replace solely on the basis of examining the referenced and modified bits for each page frame. List several incorrect decisions the memory manager might make.
What will be an ideal response?
Right after the referenced bits are reset, there would be a large number of pages indicating
unreferenced and unmodified. These would be equally susceptible to replacement.
Pages referenced recently and pages not referenced for a while would be treated equally,
when in fact it is normally best to replace pages that have not been referenced for some time.
The modified bit “never lies.”
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