GATE CSE 2014 Set 1 | GATE CSE Year Wise Previous Years Questions

GATE CSE 2014 Set 1

MCQ (Single Correct Answer)

-0.6

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

Neither $$L$$ nor $$\overline L $$ is recursively enumerable (r.e).

One of $$L$$ and $$\overline L $$ is r.e. but not recursive; the other is not r.e.

Both $$L$$ and $$\overline L $$ are r.e. but not recursive.

Both $$L$$ and $$\overline L $$ are recursive.

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