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17. Give regex's which precisely describe: a. All binary strings of 4-or-more e's? b. All binary strings of odd length containing alternating e's and 1's. c. All binary strings over and 1 representing numbers greater than 5 when interpreted as binary numbers. d. All binary strings over e and 1 representing numbers which are evenly divisible by 4 when interpreted as binary numbers. e. All binary strings of length less than or equal to 5 containing only e's and 1's where the number of e's is equal to the number of 1's.

17. Give regex's which precisely describe: a. All binary strings of 4-or-more e's? b. All binary strings of odd length containing alternating e's and 1's. c. All binary strings over and 1 representing numbers greater than 5 when interpreted as binary numbers. d. All binary strings over e and 1 representing numbers which are evenly divisible by 4 when interpreted as binary numbers. e. All binary strings of length less than or equal to 5 containing only e's and 1's where the number of e's is equal to the number of 1's.

Database System Concepts
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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17. Give regex's which precisely describe: a. All binary strings of 4-or-more e's? b. All binary strings of odd length containing alternating e's and 1's. c. All binary strings over and 1 representing numbers greater than 5 when interpreted as binary numbers. d. All binary strings over and 1 representing numbers which are evenly divisible by 4 when interpreted as binary numbers. e. All binary strings of length less than or equal to 5 containing only e's and 1's where the number of e's is equal to the number of 1's.
Transcribed Image Text:17. Give regex's which precisely describe: a. All binary strings of 4-or-more e's? b. All binary strings of odd length containing alternating e's and 1's. c. All binary strings over and 1 representing numbers greater than 5 when interpreted as binary numbers. d. All binary strings over and 1 representing numbers which are evenly divisible by 4 when interpreted as binary numbers. e. All binary strings of length less than or equal to 5 containing only e's and 1's where the number of e's is equal to the number of 1's.
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