marking Netherlands Meaning

...arking the answer sheet - Y for Heads and N for Tails. Within half an hour he is all done whereas the rest of the class is sweating it out.During the last few minutes, he is seen desperately throwing the coin,swearing and sweating.The invigilator, alarmed, approaches him and asks what is going on.""Oye, I finished the exam in half and hour"". ""But yaar"", he says,""I ...