I would not be insulted by those question at all isotope - I mean, you have to draw the line somewhere and if you have to ask questions, those are pretty good.

I recently had a technical interview (via phone), and I was asked much simpler questions:

• what is use strict
• name an instance where you used a CPAN module
• how do you open a file for writing
• how would you replace a char in string and how do you store the number of replacements

What is interesting is to find out how someone rates themselves on a scale of 1-10. I would rate myself at a 5, but that's because I look at this site (PM) everyday and am constantly introduced to many slick and efficient ways of solving problems in Perl that I never would have thought of myself. I feel like a guppie swimming with sharks. But if I were asked that same question by an employer/interviewer, I would rate myself at 8, because they rarely understand just how much there is to Perl. I pointed that out to a headhunter a while back - where I would have a rating of 8 in Java or VB, it just doesn't apply the same to Perl.