[the_cap_theorem]

Yes, like most of the "undefined behaviour allows your computer to format the disk"-style posts this one seems to be written by a programmer with novice-intermediate C knowledge.

What irks me is the intro >> The purpose of this article is to make everyone (especially C programmers) say: “I do not know C”. <<

I think the purpose of the article was mainly for the author to write down some things he learned. Apparently it was his expectation that readers wouldn't be able to answer the quiz.

However, if you can't answer (at least most) of these questions correctly you're _not_ an expert c programmer.

So I think the correct intro here should be "The purpose of this blog post is to to show that if you want to learn C, you actually have to learn it and should not attempt to 'wing it'".

...and maybe also that you should not write patronizing blog posts about a topic which you haven't fully grasped yet yourself.