When going on a job interview there is a certain way you have to do things. Such as, standing up straight, giving a firm hand shake and dressing professionally. Males should wear slacks, dress shoes, long sleeve button down shirt, and a tie. Females should wear a pant suit, slacks with a blouse, or a knee length dress. The first question most people ask is "why do I have to change how I look to get a job, don't they want to know the real me?".  They do but think about it, would you wear a swimming suit to a banquet?  You should always dress for the occasion. Always remember first impressions are everything and you only get one, make it count!