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.

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 5 of 15

Explore more Topics under Formal Languages and Automata Theory

01

Basics of Automata Theory

02

Finite Automata

03

DFA Minimization

04

Context Free Grammars

05

Regular Languages

06

Push Down Automata

07

Context Free Languages

08

Introduction to Turing Machines

09

Undecidability and Intractable Problems

Q41.

A language can be generated from simple primitive language in a simple way if and only if

It is recognized by a device of infinite states

It takes no auxiliary memory

Both are correct

Both are wrong

Discuss

Answer: (b).It takes no auxiliary memory

Q42.

Which of the following does not represents the given language?
Language: {0,01}

0+01

{0} U {01}

{0} U {0}{1}

{0} ^ {01}

Discuss

Answer: (d).{0} ^ {01}

Q43.

According to the given language, which among the following expressions does it corresponds to?
Language L={xϵ{0,1}|x is of length 4 or less}

(0+1+0+1+0+1+0+1)^4

(0+1)^4

(01)^4

(0+1+ε)^4

Discuss

Answer: (d).(0+1+ε)^4

Q44.

Which among the following looks similar to the given expression?
((0+1). (0+1)) *

{xϵ {0,1} *|x is all binary number with even length}

{xϵ {0,1} |x is all binary number with even length}

{xϵ {0,1} *|x is all binary number with odd length}

{xϵ {0,1} |x is all binary number with odd length}

Discuss

Answer: (a).{xϵ {0,1} *|x is all binary number with even length}

Q45.

Concatenation Operation refers to which of the following set operations:

Union

Dot

Kleene

Two of the options are correct

Discuss

Answer: (b).Dot

Q46.

Concatenation of R with Ф outputs:

R.Ф

None of the mentioned

Discuss

Answer: (b).Ф

Q47.

RR* can be expressed in which of the forms:

R+

R-

R+ U R-

Discuss

Answer: (a).R+

Q48.

A finite automaton accepts which type of language:

Type 0

Type 1

Type 2

Type 3

Discuss

Answer: (d).Type 3

Q49.

Which among the following are incorrect regular identities?

εR=R

ε*=ε

Ф*=ε

RФ=R

Discuss

Answer: (d).RФ=R

Q50.

Simplify the following regular expression:
ε+1*(011) *(1*(011) *) *

(1+011) *

(1*(011) *)

(1+(011) *) *

(1011) *

Discuss

Answer: (a).(1+011) *

Page 5 of 15

Welcome to the Regular Expressions MCQs Page

Regular Expressions MCQs | Page 5 of 15

Explore more Topics under Formal Languages and Automata Theory

Basics of Automata Theory

Finite Automata

DFA Minimization

Context Free Grammars

Regular Languages

Push Down Automata

Context Free Languages

Introduction to Turing Machines

Undecidability and Intractable Problems

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