There was one interview only. The structure was half discussion about items on my resume and half STAR questions. The interviewer wrote down almost every response I had, and also took notes about my attire, smiling, general disposition. He wrote almost 2 pages of notes in the hour session. He gave me a combination of specific situation questions and open-ended questions that allowed me to talk about any achievement or experience I had in mind. Some people warned me that my particular interviewer was very mechanical or impersonal, but I felt he was very professional and was personal enough. I really enjoyed speaking with him.