Friday as in the 22nd?? Hes just going to go through your application and ask you general questions to find out what sort of person you are. He told my careers adviser that he won't ask any hard or trick questions. He will probably ask you why you want to do a business cadetship? why are you interested in the particular course of study you want to do? etc etc. I think there will be a fair bit of time remaining, so make sure you have some questions to ask as well. Don't be stressed, just know what you wrote in ur application well and be calm.
Oh and one more thing, if you put a preference down, just make sure you know a bit about the company you are interested in. If you didn't have a preference, just have a general knowledge of what all the companies do.
Good Luck =)