Comment by Swizec

Surely that depends what your hiring them for?

The nice thing about the website load question is that it touches every part of the stack. You could talk for an hour about rendering on screen at the OS level, or network protocols, or server stuff, or web client stuff, or data center stuff, or …

Really to answer the question in its full entirety would be the equivalent of that “Everything that goes into a pencil” essay. You could build an entire college curriculum just out of that question.