Meta Quantitative Engineering interview questions

I applied through campus recruiter. The recruiter was very nice and arranged the phone interview very soon. The phone interview was 45 minutes. First, The interviewer very briefly asked my background (about 2 minutes?), then moved to the coding test. The coding question was not hard. I gave a simple solution first, but the interviewer asked if I can improve it. Then I gave a better solution. Sounds like the interviewer was satisfied with the second one. the last 5 minutes, the interviewer asked me if I have any questions. I said no.