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TOC-grand test-Q3


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+2 votes

For arbitrary DCFGs G, G1 and G2 and an arbitrary regular expression R. Which of the following is UNDECIDABLE ?

(A) Whether \small L(G1) \cap L(G2) is a DCFL ?

(B) Whether \small L(G) = L(R) ?

(C) Whether \small L(R) \subseteq L(G) ?

(D) Whether \small L(G) \subseteq L(R)?

asked Sep 7, 2019 by gbeditor-2 (72,840 points)
reshown Sep 8, 2019 by gbeditor-2

1 Answer

0 votes
 
Best answer

ANS A.

L(G1)= DCFL and L(G2) = DCFL. And DCFL's are NOT closed under Intersection operation. Thus OPTION A is UD.

Option B is Equivalence prob which is Decidable.

answered Sep 8, 2019 by bhargavakapilpro20 (14,660 points)
selected Sep 11, 2019 by
Answer:

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