Let Be the Encoding of a Turing Machine as a String

question 12

Multiple Choice

Let be the encoding of a Turing machine as a string over ?= {0, 1}. Let L = { |M is a Turing machine that accepts a string of length 2014 }. Then, L is

• A)decidable and recursively enumerable
• B)undecidable but recursively enumerable
• C)undecidable and not recursively enumerable
• D)decidable but not recursively enumerable

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