There was one problem for the whole interview. If you were stuck, then you were out. The interviewer didn't state the question clearly, and he had connectivity issues due to construction work. He ended the interview on time, although there was wasted time in between due to the connectivity.
After a couple of indirect questions, the summary of the question was to implement an encryption algorithm like AES.
The following metrics were computed from 7 interview experiences for the Meta Software Engineer role in Egypt.
Meta's interview process for their Software Engineer roles in Egypt is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Meta's Software Engineer interview process in Egypt.