Implement DFS for connected components

Q: Implement DFS for connected components

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

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Question

Given an undirected graph with n nodes (1 ≤ n ≤ 200, 000) and an edge list, implement depth-first search to compute (a) the number of connected components and (b) the size of the largest component; provide both recursive and iterative implementations; discuss stack-safety for large graphs, time and space complexity, and how you would test edge cases.

Implement DFS for connected components

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