During the interviews, phone and face to face, you are required to answer situational questions using the STAR format. The interviews took approximately 45 minutes. To prepare for the STAR format questions think about your past work situations and be prepared to talk about those situations in detail. They will ask you further clarifying questions if you don't give enough detail. I found that it was easy to describe the situation/task and actions but by time I gave all the details I would almost forget to describe the results. During the phone and face to face interviews they did explain how to answer in the format that they wanted and let you know when they were beginning to ask those questions.