All interviews below the 3 band level are the same:
Optional Telephone interview to screen out excess applicants.
Depending on the # of positions available, they'll interview anywhere from 2 to 8 candidates.
The interview is a panel format with the hiring manager, another manager and a HR rep (a fourth person can be present but is seldom the case)
The first part of the interview is technical and directly related to the job. ( This is optional or brief for certain positions that are newly created or developmental in nature)
The next part is the behavioral questions, consists of 7 or 8 questions designed to test the preparedness of the applicant and their fit within the organization. They highlight the applicants ability to work in teams, to lead, to come up with new ideas, to change, and to understand the companies ethical code.
The whole process is anywhere from 1 hour to 3 hours plus.