Northrop Grumman System Engineer interview questions

Two stage interview process, first 30 mins long, second 2 hours long. Two people on the panel. Friendly chat style interview. Quick feedback after first interview asking to attend second interview however after completing the second interview I heard nothing. Not sure if this was because NG didn't provide feedback to the recruiter or because I didn't get an offer and the recruiter lost interest cos there was no money in it for them but the upshot was I didn't hear anything after the second interview which isn't a good candidate experience.