I once had 8 interviews and presumably lost on the last one because the interviewer was wrong on the technical interview. I tried explaining confidently and in a friendly way how my answer was correct but they weren't having it.
It was a fairly basic sophomore in college topic in my field. They basically applied a rule of thumb rather than thinking about the specifics of their question.
The process is... questionable. Big part of why they want a big reserve army of labor. That wouldn't fly if they were hard up for labor.