First I had a phone interview, that basically just ask to tell about myself. Then I had a professional group interview (1 other person and the manger for that department, category manager) Finally I met with the store manager. The interviews were not very long at all and you should dress professionally or at least business casual for part-time positions. The manager who interviewed me had a very bubbly personality so I'd say smile and exude that you are energetic. In a group interview don't hesitate to answer but don't answer in a hurry and seem like you're just trying to answer first and say something that doesn't match the question or simply sounds long and drawn out for no reason.