21.1.5 - DFS Numbering Technique
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Practice Questions
Test your understanding with targeted questions
What does DFS stand for?
💡 Hint: Think about different types of search strategies in graph theory.
What is a pre-number in the context of DFS?
💡 Hint: Recall the sequence of actions taken when visiting a vertex.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does DFS stand for?
💡 Hint: Remember the traversal style it represents.
True or False: Pre numbers assigned in DFS indicate the exit time of a vertex.
💡 Hint: Consider the definitions of pre versus post numbers.
1 more question available
Challenge Problems
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Given a directed graph, perform a DFS starting from vertex A and describe the changes in pre and post numbering.
💡 Hint: Make sure to carefully track when you enter and exit each vertex.
Analyze a graph with cycles using DFS. How do the pre and post numbers reveal the presence of cycles?
💡 Hint: Look carefully at how your exit times relate to your entry times for detecting cycles.
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