You would think really? Everyone knows how to dress for an interview! Unfortunately that may not always be the case and I have witnessed a few myself. The first impression you make on your future employer is important and depending on what type of jobs you are interviewing for you really need to dress for the occasion. Regardless of the work environment, for interviews I still recommend my candidates to dress professionally and appropriately. If you are going for an interview in an IT firm, of course you should not walk in with a suit and tie and if you are going for an interview in at a law firm, a smart professional outfit would be expected.
I strongly suggest check out different social media platform like Pinterest and Instagram for inspiration. I also found this article which comes with a list of what items should be considered when putting together a professional attire for an interview. Do check it out!