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If the start symbol is one of those symbols which produce no terminal through any sequence, the CFL is said to be

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If the start symbol is one of those symbols which produce no terminal through any sequence, the CFL is said to be

(a) nullable

(b) empty

(c) eliminated

(d) none of the mentioned

This question was addressed to me in my homework.

This is a very interesting question from CFL- Closure Properties/Decision Properties in chapter Properties of Context Free Languages of Automata Theory

1 Answer

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Best answer
The correct choice is (b) empty

Explanation: In the process of removing useless symbols, if the starting symbol is also a part, the CFL can be then termed as empty; otherwise not.

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