Cisco Software Developer interview questions

Got a call from the HR representative. The representative given an overview about the job profile and the interview process. The interview was then scheduled and I received an email regarding the same. It was a full day interview consisting of 4 technical rounds. In the first round, I was asked to describe my current projects using whiteboard and markers. The interviewer had suggested some changes in the design and asked me how would I implement those design changes. The second round was about design patterns. In the third round, I was asked to write code in paper. The fourth round was about virtualization

It was long time ago. Wouldn't apply any longer. It was an average interview. Mostly around coding and the work I had done before. Operating System, Networking, Device Drivers, technology, testing etc etc.