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Welcome to the Regular Expressions MCQs Page

Dive deep into the fascinating world of Regular Expressions with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Regular Expressions, a crucial aspect of Formal Languages and Automata Theory. In this section, you will encounter a diverse range of MCQs that cover various aspects of Regular Expressions, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Formal Languages and Automata Theory.

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Check out the MCQs below to embark on an enriching journey through Regular Expressions. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Formal Languages and Automata Theory.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Regular Expressions. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Regular Expressions MCQs | Page 12 of 15

Q111.
For the given syntax of sed, which among the following is not a correct option?
General syntax of sed: /pattern/action
Discuss
Answer: (c).pattern refers to the string to be matched
Discuss
Answer: (b).It searches for text patterns
Q113.
State true or false:
Statement: A regular expression is a sequence of characters that represent a pattern.
Discuss
Answer: (a).true
Q114.
Which of the following options support the given statement?
Statement: A regular expression could be a fixed word or describe something like more general.
Discuss
Answer: (a).This flexibility makes Regular expression invaluable.
Discuss
Answer: (c).search for “man” in the file “heroes.txt”
Discuss
Answer: (b).Matches no or one occurence of the capital letter X.
Q117.
Which of the following does not support regular expressions?
Discuss
Answer: (d).none of the mentioned
Discuss
Answer: (b).sequence of alphanumeric characters in a token
Q119.
If the lexical analyser finds a lexeme with the same name as that of a reserved word,it _________
Discuss
Answer: (c).generates an error
Q120.
The methodology to show an error when the analyzer faces a keyword over an user’s input is based on:
Discuss
Answer: (a).rule priority

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