The interview process is very simple. As a Supply Corps Officer, you will go through several rounds of interviews with technical leads within the organization. Generally these interviews are a formality and only very general and basic personal questions will be brought up. The final interview is with the 4-Star Admiral. Assuming that the earlier interviews went fine, this interview is also a formality. As long as you present yourself in a professional and competent manner, there is not much to the interview process.