Propulsion Intern applicants have rated the interview process at NASA with 1.5 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 84% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Phone interview for 30 minutes. Just engineering behavioral questions. Went through my resume and did some systems technical probing about the components of a rocket engine and different kinds of systems.
None. The interview was very easy. Email them to set up an interview for yourself. Otherwise they go based on resume. It is in your benefit to email them. Read their papers beforehand.