Google

I had a 45-minute technical interview. First, I did a brief introduction and then moved on to the technical portion. After the interview, the recruiter called me for a screening call and told me I didn't pass.

Submit application. Recruiter call. Four back-to-back coding interviews (data structures and algorithms). Hiring committee reviews interview feedback. Recruiter gave feedback. Moved to offer stage. Two weeks to accept or decline.

The standard interview process at big tech companies requires a high level of knowledge, especially regarding concepts. In short, with hundreds of steps, in each one you advance and it seems like you never reach the end.