hey i think DJ's want to keep it as that all to think that he is dead .
But they have kept it as the guessing thing to believe that weather he is dead or not bcoz if they really wanted to show him dead then they could have shown it that he died during that firing itself even when rajveer was hit by the bullet in the end only before he left and he could have died that time only in the hands of naina or in b/w all his cadets....
or they could have shown the blast while he was driving or something like that but they showed straight away when the blast was already done and even cadets saw the burned jeep nothing before that.........
so i think they have left it there only that they all believe that he is dead. But i think we can keep it an open option that he has escaped also.....and how can u forget that he was an expert with the bombs?
what say????????