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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define a Pushdown Automaton.
π‘ Hint: Think about the additional memory capability compared to a finite automaton.
Question 2
Easy
What does the transition function Ξ΄ of a PDA do?
π‘ Hint: Recall the input and output requirements.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the main purpose of a Pushdown Automaton?
- To recognize regular languages
- To recognize context-free languages
- To simulate finite automata
π‘ Hint: Think about the strengths of PDAs over DFAs.
Question 2
True or False: PDAs can only accept strings by reaching a final state.
- True
- False
π‘ Hint: Recall the two acceptance conditions discussed in class.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Construct a PDA that accepts the language {a^n b^n | n β₯ 0} and describe its transitions.
π‘ Hint: Diagramming the transitions might help clarify the operation.
Question 2
Prove that the language L = {a^n b^n c^n | n β₯ 0} is not context-free using the Pumping Lemma.
π‘ Hint: Focus on what parts can be pumped and how their counts will change.
Challenge and get performance evaluation