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Questions and Answers
Which of the following is a key step in producing a topological ordering for a directed graph?
Which of the following is a key step in producing a topological ordering for a directed graph?
- Looking for a node with an indegree of one and adding it to the ordering
- Removing all outgoing edges from a node in the graph
- Adding all nodes to the ordering in a random order
- Finding a node with an indegree of zero and adding it to the ordering (correct)
What is the significance of a node with an indegree of zero in a topological ordering?
What is the significance of a node with an indegree of zero in a topological ordering?
- It has the highest indegree in the graph
- It is the first node in the ordering (correct)
- It is the last node in the ordering
- It has the lowest indegree in the graph
What happens to a node once it is added to the topological ordering?
What happens to a node once it is added to the topological ordering?
- It and its incoming edges are removed from the graph
- It is marked as visited but remains in the graph
- It is marked as visited and removed from the graph
- It and its outgoing edges are removed from the graph (correct)
How do we find the next node to add to the topological ordering after the first one?
How do we find the next node to add to the topological ordering after the first one?
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What do we do if there are multiple nodes with an indegree of zero in the graph?
What do we do if there are multiple nodes with an indegree of zero in the graph?
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When do we stop adding nodes to the topological ordering?
When do we stop adding nodes to the topological ordering?
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