The optimal (MIN) page-replacement strategy is unrealizable because the future cannot be predicted. There are circumstances, however, in which MIN can be implemented. What are they?

What will be an ideal response?

One can imagine processes that perform long lists of sequential operations. In this
case, it would be possible to predict the next many page references.Aprogram that initializes
a huge array consisting of many pages, and initializes these in subscript-number order, would
be quite predictable, at least during this phase of its execution.