GATE | GATE CS 1996 | Question 9

Which of the following statements is false?

(A) The Halting Problem of Turing machines is undecidable
(B) Determining whether a context-free grammar is ambiguous is undecidable
(C) Given two arbitrary context-free grammars G1 and G2 it is undecidable whether L(G1)=L(G2)
(D) Given two regular grammars G1 and G2 it is undecidable whether L(G1)=L(G2)


Answer: (D)

Explanation:

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