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UGC-NET | NTA UGC NET 2019 June - II | Question 22
Which of the following problems is/are decidable problem(s) (recursively enumerable) on a Turing machine M?
(a) G is a CFG with L(G)=∅
(b) There exist two TMs M1 and M2 such that L(M) ⊆{L(M1)UL(M2)}= language of all TMs
(c) M is a TM that accepts w using a most 2|w| cells of tape
(A)
a and b only
(B)
a only
(C)
a, b and c
(D)
c only
Answer
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