Interviews are in a behavioural format so they will ask you to pull examples from your past experiences (e.g. tell us about a time when you had to...). The more specific your answers - the better. Since you won't necessarily have an example that immediately comes to mind for every question, it's okay to ask for more time to think of one or ask the interviewer to come back to the question at the end of the interview.
There was a long comprehensive test before the interview was granted.