DETERMINISTIC FINITE AUTOMATA (DFA)
- If for every input symbol of an alphabet there is an exactly one transition from every state of finite automata then such FA is called as DFA.
- DFA covers deterministic transitions for all valid and invalid strings in the given regular language.
- For every valid string, DFA reaches to the final state and for every invalid string it reaches to the non final state.
Specifications of DFA
DFA = (Q, Σ, δ, q0, F) is a 5-tuple notation
where, Q is the set of finite states,
Σ is an input alphabet contain finite number of input symbols.
δ is a transition function defined over transitions of FA for state and input, (δ : Q × Σ → Q)
q0 is an initial state or start state of DFA, (q0 ∈ Q).
F is the set of final states of DFA (F ⊆ Q).
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