Standard LeetCode interview. Not particularly original.
If you can do LeetCode problems, you can work for Facebook. This will induce a certain selection bias, which may or may not work in your favor.
LeetCode.
This is how they hire.
The following metrics were computed from 92 interview experiences for the Meta Machine Learning Engineer role in United States.
Meta's interview process for their Machine Learning Engineer roles in the United States is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Meta's Machine Learning Engineer interview process in United States.