That's an unwise way to filter out candidates. It's an obscure and unimportant syntax feature whose effect can be accomplished in many other, more readable ways

That's an unwise way to filter out candidates. It's an obscure and unimportant syntax feature whose effect can be accomplished in many other, more readable ways. Writing line noise using obscure syntax is not a sign of a good programmer. If you want to find good candidates, give them an assignment in bash and make them explain their solution.