GATE | GATE CS 1997 | Question 19

Given ∑ = {a, b}, which of the following sets is not countable?

a. Set of all strings over ∑
b. Set of all languages over ∑
c. Set of all regular languages over ∑
d. Set of all languages over ∑ accepted by Turing machines
(A) a
(B) b
(C) c
(D) d

Answer: (B)


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