I actually wrote this back in 2013, so as you say it is a little dated by the approach in Spring. It has been useful in the past to me as it was possible to identify which applicants had a grasp of good coding practices. It is certainly not a IQ test. Hopefully this will inspire others to write similar tests for other languages. You are right about post test interviews, in that this test is used as a foundation to explore their reasoning processes. I appreciate your feedback.
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