Northrop Grumman interview questions

Recieved initial phone interview with HR, which was just to set up a phone interview with a manager. The same day, I recieved email from HR that they would like to have me come in for a company site interview, which lasted a whole day. However, the company site interview was pleasant. Everyone was very nice and asked simple behavioral and technical questions. I think they just want to make sure your personality fits well with the group.