When encountering cycles in a graph, BFS _______ revisits already visited nodes.
- Always
- Never
- Occasionally
- Sometimes
When encountering cycles in a graph, BFS never revisits already visited nodes. BFS uses a queue to explore nodes, and once a node is visited, it is marked as such. Since BFS explores nodes level by level, it does not revisit nodes, ensuring that cycles do not lead to infinite loops.
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