Mirror a binary tree and analyze complexity

Q: Mirror a binary tree and analyze complexity

This is a Coding & Algorithms interview question from Palo Alto Networks for Software Engineer roles. View the full question and solution on PracHub.

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Question

Given the root of a binary tree, convert it to its mirror by swapping every node’s left and right children. Implement both recursive and iterative (using a stack or queue) solutions, analyze time and space complexity, and discuss edge cases (empty tree, single node, highly unbalanced). Perform a dry run on this tree (level order): [5,3,8,null,4,7,9].

Mirror a binary tree and analyze complexity

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