Mostly behavioral. The manager who interviewed me was very friendly, went through my resume and asked for detailed expansion on my experiences. Then got the call a week later with an offer.
Application
I interviewed at Northrop Grumman
Interview
The interview was conducted over the phone. It was all behavioral and situational questions. No technical questions were asked for the summer internship interview. I wasn't sure if I would need to know a lot about the line of service that I would be working in but my interviewer reassured me and provided a summary of the work that he does at the beginning of our call.