Initial Interview process was weird because it was online and just gave a prompt for 30 seconds and then started recording your answer for 5 minutes. It would then do the same for each question. There were probably 7-9 questions. You can have (and they even encourage having) notes during that interview which is a great way to prepare. Find about every common interview question and create bullet points to tell a story-type answer to the question. The later interview(s) are mostly just meeting your managers and discussing summer projects.