![]() Given its complex nature, it is tougher to construct DFA. It is not possible to use backtracking at all times in the case of NFA. It is possible to use backtracking in DFA. NFA rejects the string in the event of all branches dying or refusing the string. NFA is like multiple small machines that are performing computational activities at the same time.ĭFA rejects the string in case it terminates in a state that is different from the accepting state. No specifications are needed from the user with respect to how certain symbols impact the NFA.ĭFA is not capable of using an Empty String transition.ĭFA can be best described and understood as one machine. Basis of Differenceįor each symbolic representation of the alphabet, only a singular state transition can be attained in DFA. The main difference between DFA and NFA, the two classes handling the transition functions of finite automata/ finite automaton theory, impact their behaviour in many ways. NFA is like multiple small machines that are performing computational activities at the same time. ![]() DFA can be best described and understood as one machine. DFA refers to Deterministic Finite Automaton. NFA refers to Nondeterministic Finite Automaton. In this article, we aim to explain the difference between DFA and NFA in tabular form to help users understand what DFA is and what is NFA in the simplest terms.
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