[milofeynman]

I don't know a single person across my org that will ever have to invert a binary tree. It's a hilarious problem that helps people who know it's a kind of problem asked, and hurts those who walk into it blind.

[fvdessen]

I think the point of fizzbuzz & inverting binary trees type of questions is to filter out people having issues solving them blind

[mianos]

I should have put a smiley after the bit about inverting a binary tree. :) It is a common joke. The rest is true though.