Nielsen Internship interview questions

Applied via email, then received a call for an invitation to interview. Interviewer was from HR and asked about me, (i.e what I liked to do and what were my experiences etc), then asked about work ethic. Moved to talking about the job itself and how I thought of the nature of said job. Wrapped up the interview politely and warmly; overall, a good experience

The interview was pretty straightforward, similar to a case interview for a consulting position. There were 3 cases in a row and they got harder as they progressed. I didn't think the interviewers were very friendly and they were silent for most of the time when they weren't asking questions making the process very uncomfortable - they took a few months to get back to me to let me I didn't get the position.