Two rounds.
Two problems in each interview.
I needed to optimize fully to pass the interview. I was not able to solve one problem optimally, and the interviewer wouldn't let me move on.
Sliding window problem, medium level
The following metrics were computed from 15 interview experiences for the Meta Software Engineer (Internship) role in Canada.
Meta's interview process for their Software Engineer (Internship) roles in Canada is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Meta's Software Engineer (Internship) interview process in Canada.