GATE | GATE-CS-2001 | Question 32

Consider the following problem X.

Given a Turing machine M over the input alphabet Σ, any
state q of M And a word w∈Σ*, does the computation of M
on w visit the state q?

Which of the following statements about X is correct?

(A)

X is decidable

(B)

X is undecidable but partially decidable

(C)

X is undecidable and not even partially decidable

(D)

X is not a decision problem

Answer

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