Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Construct Pushdown Automata

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Beginner

Intermediate

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In the context of pushdown automata, what is the main purpose of the stack?

a: To store input symbols. Explanation

Explanation

b: To store intermediate results during computation. Explanation

Explanation

c: To store the transition rules. Explanation

Explanation

d: To store the final output. Explanation

Explanation

What distinguishes a pushdown automaton (PDA) from a finite automaton (FA)?

a: The PDA has an infinite tape. Explanation

Explanation

b: The PDA has a stack for additional memory. Explanation

Explanation

c: The PDA can recognize non-regular languages. Explanation

Explanation

d: The PDA uses transition rules instead of states. Explanation

Explanation

How does the construction of a pushdown automaton (PDA) differ from that of a finite automaton (FA) when recognizing languages?

a: PDAs are only constructed for regular languages, while FAs can recognize context-free languages. Explanation

Explanation

b: PDAs use a stack for additional memory, enabling recognition of context-free languages. Explanation

Explanation

c: PDAs have fewer states compared to FAs for the same language. Explanation

Explanation

d: The construction process is identical for both PDAs and FAs. Explanation

Explanation

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