There are quite a lot of computer architecture questions. For example, cache and MMU. Operating system coding is relatively easy, mainly in C/C++. There are a lot of questions regarding Ethernet, 802.3, protocols, and networking processors.
Difference between thread and process
The following metrics were computed from 3 interview experiences for the Apple Validation Engineer role in United States.
Apple's interview process for their Validation Engineer roles in the United States is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Apple's Validation Engineer interview process in United States.