Your appearance is important. A conservative, modest suit is a good choice of what to wear. B. Be Punctual.
Punctuality demonstrates courtesy to the interviewer.
It also reflects your professional character. If there is a valid reason for being late , call and let the interviewer know your situation. Committee interviews are usually held in the faculty or professional person's office. Know where it is before planning your day. You will receive a letter from the advising office informing you of the date, time and place for your committee interviews.