Follow-up · depth 7
How would you explain DFS Cycle Detection (Directed Graph) to a junior engineer?
How would you explain DFS Cycle Detection (Directed Graph) to a junior engineer?
Answers use simple, clear English.
Audio N/AQuick interview answer
Explain DFS Cycle Detection (Directed Graph) in one sentence, then a tiny example, then one “don’t do this” tip. Mitigate first, then root-cause. Check symptoms against: Using two-color visited only (misses cross edges in undirected); forgetting disconnected components..
Detailed answer
Junior-friendly explanation of DFS Cycle Detection (Directed Graph): Plain English: Mitigate first, then root-cause. Check symptoms against: Using two-color visited only (misses cross edges in undirected); forgetting disconnected components.. Tiny example: Build pipeline: detect circular module imports before CI runs. One warning: Using two-color visited only (misses cross edges in undirected); forgetting disconnected components.
Full explanation
Keep jargon low, then layer detail. Three-color DFS: white=unvisited, gray=in current stack, black=done. Back edge to gray node ⇒ cycle. Works for dependency graphs and course prerequisites.
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Parent context — DFS Cycle Detection (Directed Graph)
Mitigate first, then root-cause. Check symptoms against: Using two-color visited only (misses cross edges in undirected); forgetting disconnected components..
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