Follow-up · depth 8
Design a small subsystem that relies on DFS Cycle Detection (Directed Graph)
Design a small subsystem that relies on DFS Cycle Detection (Directed Graph)
Answers use simple, clear English.
Quick interview answer
Sketch components, data flow, failure modes, and metrics around DFS Cycle Detection (Directed Graph). Example shape: Build pipeline: detect circular module imports before CI runs.
Detailed answer
Mini design using DFS Cycle Detection (Directed Graph): • Components: API edge, worker/queue, store, and observability. • Data flow: request → DFS Cycle Detection (Directed Graph)-related path → response/async side effects. • Failure modes: timeouts, overload, partial dependency loss. • Metrics: latency, errors, saturation for the DFS Cycle Detection (Directed Graph) path. Guardrails: Loop all nodes as DFS roots; explain gray = active recursion path. Parent context: Mitigate first, then root-cause. Check symptoms against: Using two-color visited only (misses cross edges in undirected); forgetting disconnected components..
Full explanation
Interviewers want a crisp architecture story anchored on DFS Cycle Detection (Directed Graph), not a buzzword list. Three-color DFS: white=unvisited, gray=in current stack, black=done. Back edge to gray node ⇒ cycle. Works for dependency graphs and course prerequisites.
Follow-up questions
Only answered follow-ups are shown — click to open with full answers
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..
View full parent question →