You no waste of space, true wastes of space don't even know they are wastes of space. I am a waste of space, but the way I see it is that if I didn't waste so much space someone else would waste it it even more badly than me so I am doing someone a favour by being a waste of space, and the more space I waste the more I am helping my fellow human people. I am a man of generous spirit as well as sorrow.

Now about exams, read the questions, read them again, plan your time, remember you get 10% just for getting the date right and spelling your name correctly (don't scoff this is more difficult than you think), then remember that to pass you need 70%, not 80 or 90, so when you have done enough to scrape 71%, move on the next question (leave space to revisit earlier questions if you want/have time), for multiple choice questions go with gut feelings when not quite sure, over-thinking leads to incorrect answers. Examiners don't want to fail you and will look for reasons to pass you but you have to help them. Good luck.