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TIMTOWDI provides a class of Perl questions which I favor: "Show N ways to do X in Perl. Describe their different properties."

For instance,

Show three ways to remove trailing newlines from the elements of a Perl array. Which would you prefer, and why?

Seekers of Perl Wisdom provides numerous cases which could be turned into this kind of question, complete with answers.

This tests knowledge of perl, rather than programming speed or CS-fu, which is good if that's what you mean to test.

After Compline,
Zaxo

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