Northrop Grumman Digital Design Engineer III interview questions

I had an initial phone interview after my application process. The phone interview was with an upper management/supervisor and not HR. I had an in-person interview with 2 groups of 2 engineers/supervisors each. I also had a short meeting with HR about their benefits. They asked lots of questions about my experience and what I was looking for. There were no tests, or white-board question/answers.