Very chill interview. I was asked mostly behavioural questions and some very easy-to-answer technical questions. I'd say if you can answer all the behavioural questions very well, you should be able to pass the interview with little difficulty. As for the technical questions, this will depend on the delivery unit you interview for, but for mine there was a big focus on java as a language (simple questions about different aspects of java) and object oriented programming as a whole.