4 Interviewers with each testing out various levels of credibility. You need to be absolutely sure about what you are saying. Keep it short but to the point. You cannot BS with them as most of the interviewers are like IT aged wines. For example: If you are interviewing in Seattle and you include Java programming as a skill , you might end up with an interview with the founder of Java himself (James Gosling). Certifications are good but if you only know the material.