IGT Software Engineer IV interview questions

I was contacted by a staffing company which was very professional in their approach which actually got me interested in applying at IGT. A technical phone interview was then scheduled within a couple of weeks with the pertaining project manager and technical architect. I was asked questions only about core java, but the questions were apt for evaluate the clarity of fundamental concepts. Interview lasted for half an hour. I was called the next day to schedule a F2F interview which was a nice experience. I was interviewed by a panel of 3. Although the questions were not that easy I was impressed with the tech architect who was very knowledgeable and articulate.