1) This is not a marking-scheme/answers-bank. Everyone's interview is unique and simply copying what other people said would not be the best idea. Just make sure whatever you say in the interview is true and really makes your personality shine in front of the interviewer.
2) This post became longer than I had initially expected. But i'm sure this recollection will give you a nice feel of the interview.
3) Always remember: be calm, be prepared, and be confident (like a boss!) [leikin ziada over bhi nahin].
Preparing yourself before the interview is essential. That is in fact, something i learned just a few days before my interview date. Receiving an AKU test score of 85.21%, which was the highest in St. Pats Alhumdulillah, i became a bit over-confident with regards to the interview, almost thinking it doesn't even matter now. Fortunately, one of my seniors took a mock interview of me a few days before the actual event and that REALLY got me down to earth; making me realize i HAVE to PLAN myself.
The night before the interview, i took 2 pieces of paper and started writing. I mapped all the achievements i wanted to talk about during the interview and wrote/thought-out my own answers to the most common questions (like those mentioned in the AKU Interview - Guidelines post). This also made me ready for some of the rather tough questions like 'what are your weaknesses?'.
Dressed in a black pant with black socks and black dress shoes, i contrasted by wearing a striped white shirt with a black tie (oh and the tie had several thin ECG lines forming hearts on the front. Was a funny one indeed. Borrowed it from a senior in 013). Having been lectured several times by my (awesome) teacher Dr. Afshan Latif, to have a GOOD BODY LANGUAGE, i walked my tall figure with a straight back and confident posture to the Sports center where i was to have my first interview.