There are two parts of the interview. One was about general qurstion on your background and interest. The other part that requires more preparation and some study about the background of the company, is done based on case study. My experience was a case study on company revenue diversification.

Interview was good. Very comprehensive when detailing the project, role and responsibilities. Interviewer provided adequate information and was up front about the salary range. Offer was issued in a very timely manner - unfortunately had to decline due to change in circumstances.