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Question

The idea of an automation with a stack as auxiliary storage-

A
Finite automata
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B
Pushdown automata
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C
Deterministic automata
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D
None of the above
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Solution

The correct option is B Pushdown automata

The idea of an automation with a stack as auxiliary storage is pushdown automata.

A pushdown automaton (PDA) is a type of automaton that employs a Stack. Pushdown automata are used in theories about what can be computed by machines. They are more capable than finite state machines but less capable than Turing machines.



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