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Which of the turing machines have existential and universal states?(a) Alternating Turing machine(b) Probalistic Turing machine(c) Read-only turing machine(d) None of the mentionedI had been asked this question by my school teacher while I was bunking the class.This intriguing question comes from Multitape Turing Machines in section Introduction to Turing Machines of Automata Theory |
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Answer» CORRECT option is (a) ALTERNATING Turing machine Explanation: ATM is divide into two sets: an existential state is accepting if some transitions LEADS to an accepting state; an universal state is accepting if every transition leads to an accepting state. |
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