Give a DFA for each of the following sets of strings over the alphabet {a, b}. Be sure to indicate the start and final states. Try to design correct DFAs that are as simple and neat as possible. a. L(a*b*a*) b. L(a*b* + b*a*) c. {w w contains the substring abab, ie, w = xababy for some x, y = {a, b}*} d. {w w is any string except ba} e. {w w is non-null and starts and ends with the same symbol}

Give a DFA for each of the following sets of strings over the alphabet {a, b}. Be sure to indicate the start and final states. Try to design correct DFAs that are as simple and neat as possible. a. L(aba) b. L(ab + ba) c. {w w contains the substring abab, ie, w = xababy for some x, y = {a, b}} d. {w w is any string except ba} e. {w w is non-null and starts and ends with the same symbol}

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

How to draw DFA for each of the following sets?

Give a DFA for each of the following sets of strings over the alphabet (a, b). Be sure to indicate the start and final states. Try to design correct DFAs
that are as simple and neat as possible.
a. L(a*b*a*)
b. L(a'b' + b'a')
c. {w w contains the substring abab, ie, w = xababy for some x, y = {a, b}*}
d. fw w is any string except ba)
e. {w w is non-null and starts and ends with the same symbol}

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