Video 2 of this series covers this basics of a case interview. It explains what what types of questions are asked and what type of answers are expected. In addition, it explains what the interviewer is looking for and WHY she is looking for it.
Contrary to popular belief, the interviewers are not out to "get you" or to "trick you" into screwing up. Their mindset has very logical motivations that once understood gives you a major advantage in the interview process vs. those applicants that don't.
To access this video and all the videos in this series, just click here for this case interview preparation video.