> Don't feel too bad nor take it personal. They probably have a lot of applicants, and are looking to grow their team by hiring someone with very specific skills.

> I also applied a few months ago while I was in the middle of my job search. For one, I couldn’t really answer their "favorite syscall question" because I’ve never dealt with syscalls :) so maybe I just wasn't a good fit.

Surely, everyone's favourite syscall is exit()