Overall, the interview was fairly easy as far as interviews go. I suppose it depends on your interviewer, but I'd venture to guess most are similar. First interview was myself and store HR. Asked me some questions about my experience, what I like to do in my spare time, why I think I would be a good fit at Menards. If you do a little prep, you'll be fine.
Second interview took a bit longer than I thought, so be patient, make sure you follow up. That one was one of the store managers and HR. Similar questions, a little more detail required in your answers. The big thing they will ask you, is if you are willing to relocate upon completion of the program. It is unlikely you will stay at the store you are training at, so you need to know that and they need to know you are committed to that.