There were two interview rounds. The first was a phone call and the next was on-site with all expenses paid for. For both rounds they were mostly asking about my experiences and 'tell me about a time when...' questions. Overall positive experience.

I have interviewed with BAE twice for entry-level roles. Just one interview each time, though you will likely talk to a recruiter beforehand over the phone or via email. Interview was normal, asking questions about your experience, some engineering fundamentals questions to test your problem solving skills. However, DO NOT expect a response from them if you do not get the job. They are terrible at providing feedback from interviews and it can be extremely frustrating. Seems like a good place to work otherwise!