. Given an alphabet with opening and closing parentheses {), (} only, create a regex that validates all strings containing the sub-string (((). Make sure to support your answer with the proper reasoning. 2. Build a regular expression that captures the 10-digit US phone numbers (10 digits excluding the coun- try code, country code is optional), where # means any number from 0 to 9. Make sure to support your answer with the proper reasoning. It is recommended to use # instead of [0-9] for simplicity and you can follow the rules mentioned below as your test cases (this list is not exhaustive). • ########## • ###-###-#### • (###) ###-#### • ###.###-#### • ### ### #### • ###.###.#### • +1 ### ### ####
. Given an alphabet with opening and closing parentheses {), (} only, create a regex that validates all strings containing the sub-string (((). Make sure to support your answer with the proper reasoning. 2. Build a regular expression that captures the 10-digit US phone numbers (10 digits excluding the coun- try code, country code is optional), where # means any number from 0 to 9. Make sure to support your answer with the proper reasoning. It is recommended to use # instead of [0-9] for simplicity and you can follow the rules mentioned below as your test cases (this list is not exhaustive). • ########## • ###-###-#### • (###) ###-#### • ###.###-#### • ### ### #### • ###.###.#### • +1 ### ### ####
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
Related questions
Question
1. Given an alphabet with opening and closing parentheses {), (} only, create a regex that validates all
strings containing the sub-string (((). Make sure to support your answer with the proper reasoning.
2. Build a regular expression that captures the 10-digit US phone numbers (10 digits excluding the coun-
try code, country code is optional), where # means any number from 0 to 9. Make sure to support
your answer with the proper reasoning.
It is recommended to use # instead of [0-9] for simplicity and you can follow the rules mentioned
below as your test cases (this list is not exhaustive).
• ##########
• ###-###-####
• (###) ###-####
• ###.###-####
• ### ### ####
• ###.###.####
• +1 ### ### ####
strings containing the sub-string (((). Make sure to support your answer with the proper reasoning.
2. Build a regular expression that captures the 10-digit US phone numbers (10 digits excluding the coun-
try code, country code is optional), where # means any number from 0 to 9. Make sure to support
your answer with the proper reasoning.
It is recommended to use # instead of [0-9] for simplicity and you can follow the rules mentioned
below as your test cases (this list is not exhaustive).
• ##########
• ###-###-####
• (###) ###-####
• ###.###-####
• ### ### ####
• ###.###.####
• +1 ### ### ####
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