> I do recall the last pair asked me to re-implement a java standard library functionality that was rather complex. It seemed out of place for an interview ques

> I do recall the last pair asked me to re-implement a java standard library functionality that was rather complex. It seemed out of place for an interview question. Allow me to respectfully disagree. Even if they ask you something you or they don't think you can do, it's not just about really solving it but at looking at how you approach such a problem. No one can really solve important, long term problems in an interview but you sure can reason about them and talk/try toy solutions. > Ex of bad question: Implement a stringbuilder. You can always say "I probably wouldn't do this unless I had a good reason but, If i had to roll my own, I'd approach it this way:"