Meta Software Engineer Internship interview questions

I applied online and asked a friend for a referral, received and email asking a few questions about my background and career aspirations from a recruiter. We got a phone interview scheduled.

Talked to engineers at my school's career fair, and was invited to an on-campus interview the next week. My question was pretty fair - a twist on CS fundamentals. However, it was my second interview ever so I was nervous and sloppy. Got to the solution but was too slow and required interviewer to point out and fix too many of my bugs