The telephone interview lasted 30 minutes. I felt that I talked too much and drifted away from the topic occasionally so the interviewer kept asking me to talk to the point. So it is important to be concise. The STAR format defintely helps though, but refrain from giving examples for every point you make, I think that's why I talked for 5+ minutes for the basic question 'why did you choose your university?'. The interview questions are standard competency based but remember to think more about your experience as the interviewer will ask about 'what have you learnt from experience' 'if there is one thing you can do differently next time, what would you do?'