The interview for the bootcamp consists of 4 stages. The really difficult ones are the first 2 technical ones. The first one is to write code that gets information from logs (I think you can use any language but I used bash). This one can take a hour or so. Second is take home project where you need to write multiple scripts (pretty difficult ones). Third is a white board interview where you get a topic before the interview and you need to study for it. The fourth one is usually done with CEO and it's more of a way to know more about the company, bootcamp and it's culture.