Amdocs Senior Subject Matter Expert interview questions

I had total 4 rounds of interview 1 & 2 - Skills interview, by managers. In this process, they have concentrated on the major problems they are facing in the existing product and were seeking the solutions for the same from me. Sounded very interesting and challenging 3 - aptitude round. this was to my surprise. they never intimated this in before hand 4 - HR & Negotiation round