This was my experience in grad school, to the point where some of my Southeast Asian friends were taken aback that I wouldn't give them test answers (just as I was taken aback that they were asking). These were nice, kind, honest, hard-working people. They just didn't view cheating on tests as wrong.

It was such a problem in our program that the professor of one class spent a good portion of one lecture talking about why cheating was wrong and what would happen if you were caught.

However, it was striking to me that I never saw the Americans of Asian/Indian descent participating in this type of collusion. So I don't think it's a cultural thing as much as it is a outcome of the educational system in those countries.

EDIT: Removed name of particular country, since it's a regional phenomenon. There's no sense in calling out a particular country.