Serialize and Deserialize a Binary Tree
Last updated: June 17, 2026
Quick Overview
Design an algorithm to serialize a binary tree to a string and deserialize it back. Tests tree traversal and string parsing skills, a recurring Google question.
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Coding & Algorithms
Software Engineer
Software Engineer
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Coding & Algorithms
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Design an algorithm to serialize a binary tree to a string and deserialize it back. Tests tree traversal and string parsing skills, a recurring Google question.
How to Approach This
- Clarify input constraints and edge cases before writing code.
- Walk through your approach verbally and confirm with the interviewer before coding.
- Start with a brute force solution, then optimize. Mention time and space complexity.
- Test your solution with examples, including edge cases like empty input or duplicates.
- Consider common patterns: sliding window, two pointers, hash map, BFS/DFS, dynamic programming.
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