GATE 1996
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Question 33
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If L1 and L2 are context free languages and R a regular set, one of the languages below is not necessarily a context free language. Which one?
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L1, L2
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L1 ∩ L2
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L1 ∩ R
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L1 ∪ L2
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Question 33 Explanation:
Context free languages are not closed under intersection.
Correct Answer: B
Question 33 Explanation:
Context free languages are not closed under intersection.
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