Is my attempt is true or where am I wrong?
DFA : The set of strings over $\{a, b\} $ that have odd length or end with $aaa$.
Is my attempt is true or where am I wrong?
DFA : The set of strings over $\{a, b\} $ that have odd length or end with $aaa$.
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Your automaton is correct but it is not minimal. The minimal automaton only has 5 states. Actually, you can obtain it by minimising your automaton. You will then identify states 2 and 4, states 3 and 5 and states 6 and 8.