Nielsen Research Analyst interview questions

I submitted my app online, a few days later an HR rep contacted me for a short phone call. It was a standard phone call - talked about my background, my interest in Nielsen (definitely an important question that you need to answer well). It went well enough that she sent me a case study, which was meant to be completed within a few days. I thought it was pretty simple, but then again, I never got feedback on it. Next part was an in person interview, where I met with a VP and then two team members after. Two 30 minute interviews that weren't too difficult, pretty conversational with a mix of personality questions and more explaining my background and why I think I would be a good fit. After the second interview, I was introduced to more members from the team, which I thought was a good sign that I had performed fairly well. Followed up after with thank you notes, then a week or so later sent an email asking if a decision had been made. No response, then sent one a few days ago and no response. Not really sure what they are looking for. I doubt I was the most qualified candidate, but I thought I did well enough to warrant a response following the interview. It's a nice building and obviously a really well known company, but I was disappointed to just be ignored post interview.

Need to give a presentation in English based on provided information. A helpful experience, make me understand the R&R. A relaxing conversation, not too difficult if you prepared well for your experience.