NASA interview questions

I applied around late September, didn't get a call back for an interview until later December. Interview was done over the phone with branch head and other members of the team. I was asked mostly technical questions about my area of focus. A week later I was invited out to tour their facility in Virginia. The tour was part of the interview process as they wanted to get to know you more and how you behaved in real person. About a month later I was notified that I did not make the cut.

They asked me many math questions, they want to make sure you are solid in algebra and geometry and are good enough solving brainteasers. Background check was also performed. There was a case on engine building calculation and physics