1) If they are competent programmers. 2) Whether they will be productive at your company/project. this is exactly what I do also, if an interviewee doesn't k

1) If they are competent programmers. 2) Whether they will be productive at your company/project. this is exactly what I do also, if an interviewee doesn't know something that I think they should, I help them learn it enough interviewers make the process unpleasant I try to do the opposite