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Push down automata accepts _________ languages.

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Push down automata accepts _________ languages.

(a) Type 3

(b) Type 2

(c) Type 1

(d) Type 0

This question was posed to me in an online interview.

I would like to ask this question from PDA-Acceptance by Final State topic in section Push Down Automata of Automata Theory

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Correct choice is (b) Type 2

Easiest explanation: Push down automata is for Context free languages and they are termed as Type 2 languages according to Chomsky hierarchy.

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