GATE | Gate IT 2007 | Question 70
Consider the regular expression R = (a + b)* (aa + bb) (a + b)*
Which deterministic finite automaton accepts the language represented by the regular expression R ?
Explanation: The equivalent NFA is as follows:
Table showing transitions between all states is as follows:
The transition table can be converted to the transition table for DFA:
Equivalent DFA for the above transition table is:
Hence option (A) is the required DFA for the given regular expression.
This solution is contributed by Yashika Arora
Quiz of this Question