Very smooth easy process. Met recruiter at a student leadership conference, referred me to apply online. I applied online and was contacted a couple weeks later for an initial phone screen where I was asked very simple questions ("Why do you want to work at Northrop?" etc, nothing strictly behavioral/technical but more of a just get to know/chit-chat with you. Might have been a special case because I had met the recruiter a couple times personally). Was told to expect a hiring manager to contact me within 3-4 weeks, but didn't hear back until 10-12 weeks later. I let them know I had another offer on the table and was scheduled for a phone interview the next day with panel (well, 2 people). They were direct potential bosses and asked about my previous work experience (they were very interested in my undergrad research which was relevant). Dug deep into my research work asking questions about it, but there were no random unrelated technical questions. Asked one or two behavioral questions. Everyone was super friendly and really nice all-around.

Filled out an online form for the job, got an email to schedule an interview and then they gave an interview with a panel of three people and it lasted half an hour.