Practice - Formal Statement
Practice Questions
Test your understanding with targeted questions
Define a Pushdown Automaton.
💡 Hint: Think about the additional memory capability compared to a finite automaton.
What does the transition function δ of a PDA do?
💡 Hint: Recall the input and output requirements.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the main purpose of a Pushdown Automaton?
💡 Hint: Think about the strengths of PDAs over DFAs.
True or False: PDAs can only accept strings by reaching a final state.
💡 Hint: Recall the two acceptance conditions discussed in class.
3 more questions available
Challenge Problems
Push your limits with advanced challenges
Construct a PDA that accepts the language {a^n b^n | n ≥ 0} and describe its transitions.
💡 Hint: Diagramming the transitions might help clarify the operation.
Prove that the language L = {a^n b^n c^n | n ≥ 0} is not context-free using the Pumping Lemma.
💡 Hint: Focus on what parts can be pumped and how their counts will change.
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Reference links
Supplementary resources to enhance your learning experience.