Those questions are a strange mixture of absolutely elementary and far more complex.
My answer to "6. Write a simple (common) regular expression to match an IP address etc" would be "that's not as simple as it sounds. I want to use a module". How would that score?
I think these questions will just betray to the interviewees that the person interviewing them doesn't know much about Perl. Perhaps you'd be better off trying to find some Perl guru local to you who could help out by attending the interviews?
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