#2 tells you nothing about the ability of the candidate to do the actual job. In fact, mostly it is assumed that the candidate should prepare for the interview

#2 tells you nothing about the ability of the candidate to do the actual job. In fact, mostly it is assumed that the candidate should prepare for the interview (i.e. #2). Instead of this, maybe you should concentrate to come up with better interviews which tells you that the candidate is a good fit AS-IS for the given position?