I had two rounds of interviews with behavioral and technical questions. The gentlemen interviewing me were incredibly kind and obviously passionate about what they did. They made the interview process very enjoyable and made me want to work for the company even more. Make sure you know the company, know the culture, and know the values they uphold.
I had to know my 'stuff' about data science and analytics and the case studies were certainly run of the mill. Knowing the culture of the company and how they view their relationships with their clients will help you answer these questions.