23.2.7 - Existence of Vertex with Indegree 0
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
Define a Directed Acyclic Graph (DAG).
💡 Hint: Think about what 'acyclic' means.
What does indegree represent in a graph?
💡 Hint: Consider the direction of the edges.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does DAG stand for?
💡 Hint: The acronym includes 'Acyclic'.
True or False: Every directed graph must have at least one vertex with indegree greater than 0.
💡 Hint: Think about independent vertices.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Given a DAG representing tasks: Task A must be completed before Task B, and Task B must be completed before Task C. Can you suggest a topological ordering of these tasks?
💡 Hint: List the tasks starting from no dependencies.
Consider a more complex DAG with tasks A through E with the dependencies A -> B, A -> C, B -> D, and C -> D and D -> E. What is one valid topological order?
💡 Hint: Follow the dependency chains while sorting.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.