Meta Intern interview questions

I applied through a recruiter and exchanged quite a few emails. Initially I was asked a few behavioral questions through email. Once those questions were answered, the recruiter asked me to schedule the 1st telephonic interview. I was asked just one question which was a real world problem based on Data Structures. The interviewer emphasized on the complexity of the program. It went well but I took a lot of time. Got a reject within 3 days.

The first portion of the interview process was a phone interview. It was a ridiculous trick coding problem that I think was just to see how I would approach it. My interviewer was incredibly unhelpful and ignored several of my questions. He seemed very distracted, and I could hear crinkling and chewing while I was working, so I'm assuming he was eating while interviewing me. Very unprofessional and unexpected from a company of Facebook's caliber.