A Guide for Medical Students, five reasons why interviews fail. Applicant does not listen to the questions being asked. Interviewers may get annoyed by having questions answered that were not asked. Rambling, providing superfluous information. The bottom line in the interview is that you have to sell yourself.
Appropriate dress is an essential part of any interview.
Keep in mind that most interviewers are conservative. Above all, dress neatly. Does not need to be expensive, but it should be well-cult and tailored. If you don't have or cannot afford a suit, wear a navy blue sport jacket with matching pants. The shirt should be plain white long sleeve with a conservative tie.