I was contacted by a recruiter and had two phone calls with technical leads. Following this, I was invited on-site for a tour and an interview.

During the on-site visit, I gave a presentation about a previous technical project. Afterward, I had one-on-one interviews with a few of the technical leads.

These interviews involved discussing my resume and tackling challenging thought problems related to rocket manufacturing, which they are currently working on.

While I didn't feel I answered a single question correctly, my thought process must have been adequate, as I received an offer!

As I understand it, you sign an NDA before the interview that prohibits you from disclosing the actual questions.

Just know the interviewers sounded like they made them up a few minutes before the actual interview, and it was related to whatever they were working on that day.