This supports the view that any interview is really focused on finding a reason not to hire someone rather than finding reasons to hire them. Because if the candidate isn't already someone that could do the job then the company wouldn't be talking to them. I think I first read that view in the book "What Does Somebody Have to Do to Get a Job Around Here??" by Cynthia Shapiro. Some of the advice in that book is a bit dated but it does a good job of conveying the main challenges from both sides of the hiring process.