Where to test my skills?

Question

Is there a webpage whith good level where I can test my skills in this languages: Actionscript php c++ java ruby ruby on rails python pl/sql sql

I'm looking for a multiplechooice page with question in language with the same or more skill level as it would be this one for an algorithm test:

What is the time complexity of calculating scalarProduct(...) for two vectors of size n, in the worst case? Assume integer arithmetic in O(1). Choose one answer.
a. O(n^2)
b. O(2^n)
c. O(n )
d. O(log n)
e. O(n log n)

Not the answer of this problems, more problems but focused to this kind of problems :D

any suggestions? or any good questions that you could post?

Thanks and sorry for the english, I will try to improve it.

Answer 1

http://www.brainbench.com/

Answer 2

While some questions might not be multiple choice, this site might have some useful Q&A for testing your skills :)