Exercise 10: Develop a regular expression that will accept strings consisting of three or four words only (a word is a collection of "word" characters separated by a space, the start of the expression, or the end of the expression). There may or may not be punctuation at the end of the string: (Hint: The test cases include cases where there are extra spaces at the end of the string) Exercise 10 Test Strings: Test Suite: (Should be ACCEPTED) REJECTI one two three REJECT: one two three four REJECT: 1 2 3 4 REJECT: how many worda? Test Suite: (Should be REJECTED): REJECT: word word REJECT: word REJECT: MOrd word REJECT: word word word seord word REJECT: Mord! word word REJECT: word word

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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Exercise 10: Develop a regular expression that will accept strings consisting of three or four words only (a word is a collection of "word" characters separated by a space, the start of the expression, or the end of the expression).
There may or may not be punctuation at the end of the string: (Hint: The test cases include cases where there are extra spaces at the end of the string)
Exercise 10
Test Strings:
Test Suite: (Should be ACCEPTED)
REJECT: One two three
REJECT: one two three four
REJECT: 1 2 3 4
REJECT: hoM many words?
Test Suite: (Should be REJECTED):
REJECT: WOrd word
REJECT: WOrd
REJECT: WOrd word
REJECT: Word word word word word
REJECT: Word! word word
REJECT: word word
Transcribed Image Text:Exercise 10: Develop a regular expression that will accept strings consisting of three or four words only (a word is a collection of "word" characters separated by a space, the start of the expression, or the end of the expression). There may or may not be punctuation at the end of the string: (Hint: The test cases include cases where there are extra spaces at the end of the string) Exercise 10 Test Strings: Test Suite: (Should be ACCEPTED) REJECT: One two three REJECT: one two three four REJECT: 1 2 3 4 REJECT: hoM many words? Test Suite: (Should be REJECTED): REJECT: WOrd word REJECT: WOrd REJECT: WOrd word REJECT: Word word word word word REJECT: Word! word word REJECT: word word
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