Yeah, calibrating coding questions for timed interviews is really tricky and in my experience always requires iteration. Trick questions with an &quot;aha!&quot; moment lead to binary outcomes (either you pass or completely flop) and don&#x27;t give much useful signal. On the other hand, simplistic questions tend to focus the interviewer on critique of stylistic details and personal coding habits&#x2F;preferences which don&#x27;t say much about the interviewee&#x27;s effectiveness.