Nuance NLP Research Engineer interview questions

I applied online and I was contacted by the HR with a set of 4-5 questions to reply by email. I sent them the replies but nothing happened and a couple of months later, I got contacted by another recruiter in the company with the same questions and after 3rd/4th time I was booked for a interview with 2-3 technical groups each working in a different city. The interview started with general introduction and later some questions about my cv. One group also asked me about the level of my familiarity with a range of skills (10 or more). I was told that the next interview would be face to face with 15-20 min presentation by me and I will hear from them.