This is an interview question - Want a balance of theoritical and a
practical answer -

If you were given a web site - in this example you can take Google
home page. If you cannot take Google site then my second option would
be the Yahoo
home page, how would you go about planning and how would you go about
testing the page.
Answer should be everything you can think in terms of testing.

At your current price, a Researcher stands to earn $1.50 by answering
this question. Given the very large scope of the question, I doubt
that you'll get a good answer unless you increase the price
considerably.