1
GATE CSE 2024 Set 1
MCQ (More than One Correct Answer)
+1
-0.33

Let $L_1, L_2$ be two regular languages and $L_3$ a language which is not regular. Which of the following statements is/are always TRUE?

A

$L_1 = L_2$ if and only if $L_1 \cap \overline{L_2} = \emptyset$

B

$L_1 \cup L_3$ is not regular

C

$\overline{L_3}$ is not regular

D

$L_1 \cup \overline{L_2}$ is regular

2
GATE CSE 2022
MCQ (Single Correct Answer)
+1
-0.33

Which one of the following regular expressions correctly represents the language of the finite automation given below?

GATE CSE 2022 Theory of Computation - Finite Automata and Regular Language Question 8 English

A
ab*bab* + ba*aba*
B
(ab*b)* ab* + (ba*a)*ba*
C
(ab*b + ba*a)* (a* + b*)
D
(ba*a + ab*b)* (ab* + ba*)
3
GATE CSE 2020
MCQ (Single Correct Answer)
+1
-0.33
Which one of the following regular expressions represents the set of all binary strings with an odd number of 1’s?
A
10*(0*10*10*)*
B
((0 + 1)*1(0 + 1)*1)*10*
C
(0*10*10*)*10*
D
(0*10*10*)*0*1
4
GATE CSE 2020
MCQ (Single Correct Answer)
+1
-0.33
Consider the following statements.

I. If L1 $$ \cup $$ L2 is regular, then both L1 and L2 must be regular.
II. The class of regular languages is closed under infinite union.

Which of the above statements is/are TRUE?
A
I only
B
II only
C
Both I and II
D
Neither I nor II
GATE CSE Subjects
Software Engineering
Web Technologies
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12