1
GATE CSE 1994
Subjective
+5
-0
Given that language $${L_1}$$ is regular and that the language $${L_1} \cap {L_2}$$ is regular is the language $${L_2}$$ is always regular?
2
GATE CSE 1989
Subjective
+5
-0
Is the class of regular sets closed under infinite union? Explain.
3
GATE CSE 1987
Subjective
+5
-0
Give the regular expression over $${\left\{ {0,\,\,1} \right\}}$$ to denote the set of proper non-null substrings of the string $$0110$$.
4
GATE CSE 1987
Subjective
+5
-0
Give minimal $$DFA$$ that performs as a Mod-$$3$$ $$1's$$ counter, i.e., outputs a $$1$$ each time the number of $$1's$$ in the input sequence is a sequence is a multiple of $$3.$$
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