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Let the class of language accepted by finite state machine be L1 and the class of languages represented by regular expressions be L2 then

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Let the class of language accepted by finite state machine be L1 and the class of languages represented by regular expressions be L2 then

(a) L1<L2

(b) L1>=L2

(c) L1 U L2 = .*

(d) L1=L2

This question was posed to me in an internship interview.

My question is based upon Regular Language & Expression in chapter Regular Expressions and Languages of Automata Theory

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Correct answer is (d) L1=L2

The explanation is: Finite state machine and regular expression have same power to express a language.

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