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Course Schedule: can you finish all courses given prerequisites (cycle detection)?

Course Schedule reduces to one question: is the prerequisite graph a DAG? The signal is spotting the graph framing and using topological sort or DFS to detect a cycle. Here is the answer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Course Schedule reduces to one question: is the prerequisite graph a DAG? The signal is spotting the graph framing and using topological sort or DFS to detect a cycle. Here is the answer.

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UP NEXT ON YOUR JOURNEY

Next in this trackDeduplicate near-identical documents in a huge corpus. Implement MinHash for fast similarity.Next in this trackImplement top-k and top-p (nucleus) sampling from a model's next-token logits.Next in this trackImplement Rotary Position Embedding (RoPE) applied to query and key vectors.

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