21.1.6 - Example of DFS Pre and Post Numbers
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Practice Questions
Test your understanding with targeted questions
What does DFS stand for?
💡 Hint: Think about how the algorithm processes nodes—deeply.
What data structure does DFS commonly use?
💡 Hint: Remember the acronym for keeping track of elements last added.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary method of exploration used in DFS?
💡 Hint: Recall the acronym when considering the strategy employed.
True or False: DFS guarantees the shortest path between two vertices.
💡 Hint: Remember how the algorithm focuses on depth over breadth.
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Challenge Problems
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Given a graph with vertices and edges, implement DFS and identify the pre and post numbers for each vertex. How do these numbers help in identifying cycles?
💡 Hint: Look for revisits in your traversal log.
Consider a scenario where you have to analyze a social network graph for strong connectivity. Use DFS with pre and post numbers to determine critical nodes whose removal would disconnect the network.
💡 Hint: Check which nodes are revisited and how their removal affects connectivity in your DFS traversal.
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