Turing Machine: RE, REC and Undecidability GATE 2014 Question #9867 with Solution

GATE 2014 · session-1

Theory of ComputationTuring Machine: RE, REC and UndecidabilitymediumMCQ2 marks

Let L be a language and L̅ be its complement. Which one of the following is NOT a viable possibility?

ANeither L nor L̅ is recursively enumerable (r.e.).BOne of L and L̅ is r.e. but not recursive; the other is not r.e.CBoth L and L̅ are r.e. but not recursive.DBoth L and L̅ are recursive.

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