The
following table lists the differences between DFA and NDFA.
|
DFA
|
NDFA
|
|
The transition from a
state is to a single particular next state for each input symbol. Hence it is
called deterministic.
|
The transition from a state can be to
Multiple next states for each input symbol. Hence
it is called non-deterministic.
|
|
Empty string
transitions are not seen in
DFA.
|
NDFA permits empty string transitions.
|
|
Backtracking is
allowed in DFA.
|
In NDFA, backtracking is not always
Possible
|
|
Requires more space.
Requires less space. A string is accepted by a DFA, if it transits to a final
state.
|
A string is accepted by a NDFA, if at least one
of all possible transitions ends in a final state.
|
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