They started by asking for examples of what I did when faced with a challenge. One point of interest was that because I used my most recent work experience in my answer when it came to the technical questions they didn't want to hear about the same work experience, so I had to describe technical aspects of a project I did over 3 years before (quite a challenge to remember). Make sure you have different examples to refer to in your technical and experience-based questions. Otherwise, the questions others have listed on glassdoor all featured. They have a tick list going through the questions so expect them all.
