I had the option of an onsite interview or a phone interview for the first round. I chose onsite.

They first showed me the office, which was pretty cool, of course, and then I was led to a room with an interviewer. The interviewer had a very different background, and we had a brief chat. It was clear to me that despite being intimately aware of what Facebook was doing for the role I was interviewing for, that topic was never touched. The interviewer did not seem to care for my background or the role I was interviewing for.

I was asked one question, and I gave it my best shot. I could definitely have done better, but it was certainly annoying to be judged based on how I solved that one question, instead of a more subjective conversation based on my background.

Data structure/algorithm-based question