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A CFG is not closed under(a) Dot operation(b) Union Operation(c) Concatenation(d) IterationThis question was addressed to me in a job interview.I'd like to ask this question from Ambiguous Grammar topic in section Context Free Grammars and Languages of Automata Theory

Answer»

Right CHOICE is (d) Iteration

For explanation: The closure PROPERTY of a context free GRAMMAR does not include iteration or kleene or STAR operation.



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