GATE | GATE-CS-2000 | Question 31

What can be said about a regular language L over {a} whose minimal finite state automaton has two states?
(A) L must be {an| n is odd}
(B) L must be {an| n is even}
(C) L must be {an| ³ O}
(D) Either L must be {an | n is odd}, or L must be {an | n is even}


Answer: (D)

Explanation: There are two states. When first state is final, it accepts even no. of a’s. When second state is final, it accepts odd no. of a’s.


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