I had 3 interviews. The first was an HR behavioral interview. Gave an overview on the role. Most be ok with travelling lot. The second was a technical over the phone interview. Fairly simple. I was asked about 4 technical questions about the skills I had put on my CV. Last interview was in person. More about how you will fit in that particular department. Show that you're willing to learn and adaptable. Also, show that you can work with other people. Research the company and your interviewer. They usually give the interviewer details before the interview. Overall a very enjoyable and stress free interview process.