This is good advice. You can definitely tell how good an organization is by the quality of their questions.
Yeah - in the interview for my current C++ job, they asked not one question about C++. Now, it might be surmised that they could tell I was reasonable by my resume but in fact, the level of their code was (is) quite low, and (I swear!) some of the ppl are curious about this newfangled 'STL' thing. Yup yup yup. And, it is indeed a corporate job.