Meta Software Engineer - Internship interview questions

I was offered the interview at a Conference. Both my first and second round happened at the Conference. Though the first round was a breeze, the second round was very hard. For the second round, since they ran out of interview booths, they interviewed me at a crowded canteen after making me wait a lot. I almost missed my second interview that was right after Facebook because they took to long to start.

Turned in my resume at an on-campus recruiting event and talked with a resume recipient. After 2 weeks, I received an email about setting up a onsite interview. On-campus onsite interview with an interviewer. One casual dinner before the interview.