This interview is usually conducted by the hiring manager or someone with the authority to hire. Since the person is often not a trained interviewer, unexpected questions may be asked in any sequence.
Most bosses are interested in:
While this is an interview, it is also a selling situation. Be attentive and observe. Choose words/phrases the interviewer will respond to positively. Don't overwhelm the recruiter by reciting your skills and accomplishments. Find out exactly what needs to be done or what problems need to be solved, and choose accomplishments that fit the situation.