Initial online tests comprised a pesonality type multiple choice test, followed by a multiple choice test on what you would be most / least likely to do in certain situations. Invited to interview just over a week later.
Interview: I was asked to wait at the packing area at the front of the store. I was then led through to a small staff canteen where the interview took place. There was only one interviewer: one of Aldi's Area Managers. The questions were quite simple: tell me about yourself, why do you want to work in retail, what do you know about Aldi, what would your ideal number of hours per week be, etc.