The article is written in an ambiguous fashion.

If it was "This is the type of interview and type of questions you're likely to come across" - then I've no real issue. As you mention, educational opportunities were not equal, so maybe counteracts the implicit bias of not being provided with general information from tutor/peers/previous-experience - "this being your first IT interview, you should know.." or "how a bunch of white guys tend to do things"

Story is being re-told through the father, son, book and now newspaper article - so who knows.