"Tell me about one of your projects that you're working on."
This is a question you can easily prepare. Select one of your stronger projects, which is also relevant for this job interview. Try to give a structured overview of the project and really link it to the vacancy and job interview.
"What's your role in that project?"
This is a behavioural question, designed to determine your future actions from your past behaviour. Present your role in the best way you can, without sounding arrogant. Try to show that you possess the qualities the vacancy demands.
"Have you taken up this role previously in the past?"
This is a behavioural question, designed to determine your future actions from your past behaviour. Try to show not only how you acted in the past, but also what you have learned from your past actions.