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Which of the following do we use to form an NFA from a regular expression?

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Which of the following do we use to form an NFA from a regular expression?

(a) Subset Construction Method

(b) Power Set Construction Method

(c) Thompson Construction Method

(d) Scott Construction Method

I have been asked this question in unit test.

The above asked question is from Equivalence of NFA and DFA topic in portion Finite Automata of Automata Theory

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Correct option is (c) Thompson Construction Method

For explanation I would say: Thompson Construction method is used to turn a regular expression in an NFA by fragmenting the given regular expression through the operations performed on the input alphabets.

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