The only three true job interview questions are:
1.  Can you do the job?
2.  Will you love the job?
3.  Can we tolerate working with you?

That’s it.  Those three.

Strengths, Motivation, and Fit.

http://www.forbes.com/sites/georgebradt/2011/04/27/top-executive-recruiters-agree-there-are-only-three-key-job-interview-questions/