I applied through my school's career site and interviewed on campus with representatives from GSA. The interview consisted of several behavioral questions, but nothing technical. Pretty basic stuff. After the interview, I had to apply through usajobs.gov and take an extensive survey on my skills, educational experience, etc. I was told in my interview that it was hard to pass/qualify and that I should exaggerate my skills. I did not pass the test so I was not put through the process further.