Illustrate with example each of the following: a. A context free grammar for the strings that consist of equal number of a’s followed by equal number of b’s. b. A regular expression for all strings of xs and ys where every y is immediately followed by at least 3 xs. c. A regular expression for all strings of ps and qs which contains an odd number of qs.

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
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Illustrate with example each of the following: a. A context free grammar for the strings that consist of equal number of a’s followed by equal number of b’s. b. A regular expression for all strings of xs and ys where every y is immediately followed by at least 3 xs. c. A regular expression for all strings of ps and qs which contains an odd number of qs.
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