I tnk the most serious mistake for NUS is to let us have test in
LT.
It is so easy to copy/cheat.
But i had a test which the lecturer is very smart. He set 4
different test papers. Alll 4 sets have the same questions, but in
different orders. Even the choice of the MCQ is messed up. The best
thing is, even with such measures, he still distribute the Q paper
in such a way tat the one sitting next to u will definately get a
different set as u~!