I Need Help With Interview Tips

Hi everyone, this is my first post n today is my birthday,  I got a call from KPMG last week intimating me of the fact that i have been shortlisted for the job of  alegal assistant.Got another call yesterday scheduling me for an interview 2moro, but i was never told the company/firm, just the sector in which it operates. I have never attended an interview, so am not sure what to expect since i can not even research on the prospective firm, Does anybody have a previous experience that may be helpful, Thanks all,