You need to do more than just anticipate possible conversations. Behavior plays a HUGE role in interview situations. Your tone of voice, facial expressions, and body language are all being evaluated.
People say that the first impression is a lasting impression.
Appearance plays a large role in first impressions. Regardless of your interest in fashion, your clothing budget, or your job level, your appearance can make or break your chances of getting a job. Appropriate interview attire is going to vary based on the company that you are interviewing with. If you do a little research about the company prior to the interview you will have a good idea of what attire that particular company expects. No matter what the attire of the company you want to appear serious about the position and confident.