nfa examples with solutions pdf

L(M) = the set of strings that have at least one accepting sequence • In the example above, L(M) = {xa x ∈ {a,b}*} • A DFA is a special case of an NFA:

(a) Show by giving an example that, if M is an NFA that recognizes language C, swapping the accept and non-accept states in M doesn't necessarily yield a new

An Example Nondeterministic Finite Automaton An NFA that accepts all strings over {0,1} that contain a 1 either at the third position from the end or at the 

Example of NFA • How does it differ from a DFA? 1 some states have multiple transitions on a given input 2 some states have no transition on an input

In a nondeterministic finite automaton (NFA), for each Example A B C D 1 ε ε 0,1 0 Accepts all binary strings where the last symbol Solution to Practice

Example from last lecture with a simpler solution Construct a DFA over {0, Example Construct an NFA over alphabet {0, 1} that accepts all strings containing 

Please write your answers in the space provided on the exam, and clearly mark your solutions You may use the backs of For each DFA state write the set of the NFA states that it corresponds to Solution: 3 For example, in the top-left entry 

Nondeterministic finite automaton (NFA) or nondeterministic finite state The grammar in the example above is ambiguous, in fact the string 2 + 3 * 5 can be 

An example of an NFA We abbreviate nondeterministic finite automata as NFA We often write (S,I interesting problems about automata and their solutions

Formal Definition of an NFA • An NFA NFA Example 1 a b c 0,1 0 Example: L = strings having substring 101 0,1 – Recall DFA: – NFA: 1 0 1 a c b d 0 0