Nice post, but your grammar while intended to be good. Though it's incorrect and you probably want to fix it.
EDIT: @chrisname below: I had a pretty hard time understanding his post.
That is a post you get when I have more important things on my mind while posting a reply. At the time of the post I was running my son's breathing treatments and getting him ready for his speech therapy. Post still isn't hard to read. I did forget the punctuation to make it a little more readable:
Nice sites, but the C++ Quiz and C Quiz site while good tests for serious programmers... Though, the setup of the sites is too lax as you can literally just go and guess the answers without even reading the question to get it right.
The first sentence is me trailing off because I realized the second sentence explains why non-serious programmers wouldn't benefit from either site.
The only thing I had an issue with is it doesn't give you incentive to learn or take it serious. I got bored and on a 4 option question I just started guessing without even reading the question until I got correct. With that setup, serious programmers won't cheat, but beginners will cheat and skip over it then say "Hey, I got all the questions right as mycppquiz.com. I obviously know what I'm talking about!"