Meta Software Developer interview questions

In-person, on site interview. 45 minutes. Purely technical/coding. One person (current engineer at FB) interviewed me, and I think it was fairly similar to other software engineering interviews, but purely technical. Did not go over anything except one coding problem on regular expressions.

A recruiter contact me a week later after the employee referral. The process is face and the interviewer is nice. There is only one question for this first phone interview. Such a pity I didn't get it.