GATE CSE 1989 | GATE CSE Year Wise Previous Years Questions

GATE CSE 1989

Subjective

-0

Is the class of regular sets closed under infinite union? Explain.

GATE CSE 1989

MCQ (More than One Correct Answer)

-0.6

Context free languages and regular languages are both closed under the operation(s) of :

Union

Intersection

Concatenation

Complementation

GATE CSE 1989

MCQ (More than One Correct Answer)

-0.6

Which of the following problems are un-decidable?

Membership problem in context - free languages.

Whether a given context - free language is regular.

Whether a finite state automation halts on all inputs.

Membership problem for type $$0$$ languages.

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