Which of the following is/are undecidable?1. G is a CFG. Is L(G) = Φ? – McqOptions

MCQOPTIONS

1.	Which of the following is/are undecidable?1. G is a CFG. Is L(G) = Φ?2. G is a CFG. Is L(G) = Σ*?3. M is a Turing machine. Is L(M) regular?4. A is a DFA and N is an NFA. Is L(A) = L(N)?
A.	3 only
B.	3 and 4 only
C.	1, 2 and 3 only
D.	2 and 3 only
Answer» E.

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