Presentation is everything. You must dress professionally from asking for an application to the interview. By professionally I mean suit and jacket for men also a tie and don't for get dress shoes. For women I would suggest a modest black dress with black heels. During the interview do not the phrase "I think." It shows that you are doubting yourself which is the last thing you want to do. Be professional, ask questions, take notes. The more interested you are with them, the more interested they will be with you.

Easy, few job related questions. schedual flexability. Shifts avilabiltys, days and holidays avilabilitys. Your job rolle, expectation, traning, education, refrences. Work history and reson for chosing the store. It is a simple easy procces,more like meet and greet.