its considered acceptable for a candidate when called for an interview to ask about the required dress code. I did this many times and worked well. You don't k

its considered acceptable for a candidate when called for an interview to ask about the required dress code. I did this many times and worked well. You don't know who will be present at the interview, e.g. it could be upper management and therefore you should dress accordingly. Asking beforehand also helps make sure you don't overdress which could make you feel uncomfortable during the interview and have a negative impact.