Serialize and deserialize a binary tree

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This is a hard difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Amazon.

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This question is commonly asked for Software Engineer candidates at Amazon during technical interviews.

Question

Serialize and deserialize a binary tree

PracHub · Accepted Answer

This question evaluates competency in designing robust serialization formats and manipulating binary tree data structures, including preservation of structure and node values, handling nulls, and reasoning about time and space complexity; it sits in the Coding & Algorithms domain (data structures/trees) and requires practical implementation skills alongside conceptual understanding. It is commonly asked to measure a candidate's ability to produce reproducible data representations, handle edge cases such as empty or sparse trees, and reason about performance and correctness for large inputs.

Quick Overview

Serialize and deserialize a binary tree