They will ask you what job you are interested in and what shift. They will also ask you about working overtime. If you are not interested in overtime, then this position is not for you. They are in mandatory overtime every Saturday.
If you get the question of what is your idea of perfect job, some people like to give funny answers and that is okay (they enjoy a laugh there) as long as you give something you follow up with something you honestly believe in. If you are not a complete idiot in the interview, you will probably get the job.