There were two interviews in total: one for systems and one for coding.
For the systems interview, you should probably look at low-level system questions. These include topics like the kernel, and what to do in certain situations (e.g., out of memory, computer slowing down).
Coding one was easy; outputting some data using hashmaps.
Systems one was a troubleshooting [exercise] of what happens when your computer starts lagging.
The following metrics were computed from 1 interview experience for the Meta Product Engineer role in Seattle, Washington.
Meta's interview process for their Product Engineer roles in Seattle, Washington is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Meta's Product Engineer interview process in Seattle, Washington.