I think if you look at the questions, you can't help but conclude that the person who *wrote* the questions knows some Perl. My guess, based on seeing similar things in other contexts, is that the intent is to design questions where the question and answer can be circulated to managers together, so that the person asking the question can have a "cheat sheet" to verify answers in domains where their knowledge is lacking. The question list that's publicly available gets produced as an artifact when interviewees come back and report what they were asked to their fellows.
I think (and some of the other people who've posted in this thread may have more insight) that this may be a sign that the people interviewing for these jobs don't generally view themselves as in direct competition with one another for a small number of jobs, but rather more like classmates trying to pass the same examination--in which case the creation of a shared knowledge base of "answers to the test questions" is a fairly common, and understandable, event--but not a defensible one.