Binary Tree Interview Problems: 6 Traversal Patterns, 15 Problems
Prakhar Srivastava
The default tree prep is sorting LeetCode's tree tag by acceptance rate, doing the top 40, and hoping the patterns transfer. They mostly don't. Tree problems feel unpredictable because the practice was organised by popularity, not by mechanism. Every binary tree interview problem is moving information through the tree in one of six ways, and once the six are visible, fifteen problems give more coverage than forty random ones. TL;DR: Binary tree interview problems cluster around six traversal pat