I applied through college or university. I interviewed at Meta
Interview
Interviewed on campus. Was asked two technical questions. The experience was very casual and not intimidating. The questions were fairly difficult though. I was also one of the later ones to interview (out of about 60 in the day) so my interviewer seemed a bit tired and out of it.
Interview questions [1]
Question 1
Given a massive grid of ones an zeroes, and given a subgrid of this, calculate the number of ones in the subgrid.