Or is there no correlation generally?
I think hard questions are reserved for students who are pretty much accepted to the school unless they really eff up the hard questions..
In some cases, it's actually an opportunity to impress. My neighbor last year was an M4 who interviewed people regularly and would ratchet up the pressure on people who were doing extremely well (to push them over the top) or really poorly (to give them a shot at redemption). I'm not sure if that's a widespread strategy, but it makes sense to me.
Hard questions or easy questions would be relative, no? What's hard for one person would be easier for someone else.
I think they mean ethical questions and questions about healthcare reform as opposed to "how has your day been," "how was the trip here?," and "tell me about yourself."
Or is there no correlation generally?