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Welcome to the Regular Languages MCQs Page

Dive deep into the fascinating world of Regular Languages with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Regular Languages, 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 Languages, 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 Languages. 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 Languages. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Regular Languages MCQs | Page 3 of 8

Explore more Topics under Formal Languages and Automata Theory

Q21.
If we select a string w such that w∈L, and w=xyz. Which of the following portions cannot be an empty string?

a.

x

b.

y

c.

z

d.

all of the mentioned

Discuss
Answer: (b).y
Q22.
Let w= xyz and y refers to the middle portion and |y|>0.What do we call the process of repeating y 0 or more times before checking that they still belong to the language L or not?

a.

Generating

b.

Pumping

c.

Producing

d.

None of the mentioned

Discuss
Answer: (b).Pumping
Q23.
There exists a language L. We define a string w such that w∈L and w=xyz and |w| >=n for some constant integer n.What can be the maximum length of the substring xy i.e. |xy|<=?

a.

n

b.

|y|

c.

|x|

d.

none of the mentioned

Discuss
Answer: (a).n
Q24.
Fill in the blank in terms of p, where p is the maximum string length in L.
Statement: Finite languages trivially satisfy the pumping lemma by having n = ______

a.

p*1

b.

p+1

c.

p-1

d.

None of the mentioned

Discuss
Answer: (b).p+1
Q25.
Answer in accordance to the third and last statement in pumping lemma:
For all _______ xyiz ∈L

a.

i>0

b.

i<0

c.

i<=0

d.

i>=0

Discuss
Answer: (d).i>=0
Q26.
Let w be a string and fragmented by three variable x, y, and z as per pumping lemma. What does these variables represent?

a.

string count

b.

string

c.

both a and b

d.

none of the mentioned

Discuss
Answer: (a).string count
Q27.
Which of the following one can relate to the given statement:
Statement: If n items are put into m containers, with n>m, then atleast one container must contain more than one item.

a.

Pumping lemma

b.

Pigeon Hole principle

c.

Count principle

d.

None of the mentioned

Discuss
Answer: (b).Pigeon Hole principle
Q28.
Which kind of proof is used to prove the regularity of a language?

a.

Proof by contradiction

b.

Direct proof

c.

Proof by induction

d.

None of the mentioned

Discuss
Answer: (a).Proof by contradiction
Q29.
The language of balanced paranthesis is

a.

regular

b.

non regular

c.

may be regular

d.

none of the mentioned

Discuss
Answer: (b).non regular
Q30.
State true or false:
Statement: Pumping lemma gives a necessary but not sufficient condition for a language to be regular.

a.

true

b.

false

c.

may be

d.

Can't say

Discuss
Answer: (a).true
Page 3 of 8

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