I don't think it would be particularly helpful, I'm coming from another regional so I have an ATP, jet time, and the interview was easy for me. I don't think that's the norm from what I've read, and I studied a lot before attending but I still don't really believe it would be helpful to anyone. Read the gouges you can find, that will help more than My comments.

I will say I think they're looking for good people, not good pilots. If you're kind of a d-bag (and you know who you are!) don't apply lol