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13 Ways to Traverse a Tree: Recursion vs. iteration is a common interview question. I will show you 13 different ways to traverse a tree to compare recursion and algorithms. I assume you have basic coding skills and are familiar with stacks, queues, recursion, and loops. If this seems too advanced for you, check this article where I have listed some resources to get you started. For every problem, I will provide also a link to Leetcode so that you can play around with my solution or write your own.