Clone Graph
Last updated: June 17, 2026
Quick Overview
Given a reference to a node in a connected undirected graph, return a deep copy of the graph. Tests graph traversal and hash map usage, a recurring Meta interview question.
Meta
Coding & Algorithms
Software Engineer
Meta
June 17, 2026Software Engineer
Onsite
Coding & Algorithms
Medium
388
0
121 solved
Given a reference to a node in a connected undirected graph, return a deep copy of the graph. Tests graph traversal and hash map usage, a recurring Meta interview 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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