Programming Language Pragmatics, Fourth Edition
Programming Language Pragmatics, Fourth Edition
4th Edition
ISBN: 9780124104099
Author: Michael L. Scott
Publisher: Elsevier Science
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Chapter 2, Problem 4E
Program Plan Intro

Deterministic Finite Automata (DFA):

  • Empty string transition is not used by the DFA.
  • It is very difficult to construct. Backtracking is possible in DFA
  • It needs more space for allocation. All DFAs are derived from NFAs.

Non-Deterministic Finite Automata (NFA):

  • Empty string transition is used by the NFA.
  • It is very easy to construct. Backtracking is not possible in NFA.
  • It needs less space for allocation. All NFAs are not DFAs.

Explanation of Solution

b.

DFA for the regular expression letter (letter | digit) *:

Explanation of Solution

c.

Minimization of above DFA:

After minimizing the above DFA,

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