1
GATE CSE 2021 Set 2
MCQ (Single Correct Answer)
+1
-0.33
Let L ⊆ {0,1}* be an arbitrary regular language accepted by a minimal DFA with k states. Which one of the following languages must necessarily be accepted by a minimal DFA with k states? 
A
{0,1}* - L
B
L.L
C
L - {01}
D
L ∪ {01}
2
GATE CSE 2021 Set 2
Numerical
+1
-0

Consider the following deterministic finite automaton (DFA).

GATE CSE 2021 Set 2 Theory of Computation - Finite Automata and Regular Language Question 16 English

The number of strings of length 8 accepted by  the above automaton is __________

Your input ____
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
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