Theory of Computation (Automata)
What does Recursively enumerable language refer to?
Difficulty: Hard
About this MCQ
This Hard Theory of Computation (Automata) question asks: What does Recursively enumerable language refer to? The correct choice is B. A class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it.. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Theory of Computation (Automata) items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Theory of Computation (Automata) so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.
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- A. The sequence of production rule applications used to generate a string from a grammar's start symbol.
Why not A: “The sequence of production rule applications used to generate a string from a grammar's start symbol.” does not fit this question. The answer is A class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it..
- B. A class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it. ✓
- C. A finite sequence of symbols drawn from an alphabet.
Why not C: “A finite sequence of symbols drawn from an alphabet.” does not fit this question. The answer is A class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it..
- D. A finite-state machine whose output values are determined solely by its current state.
Why not D: “A finite-state machine whose output values are determined solely by its current state.” does not fit this question. The answer is A class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it..
Correct answer
B. A class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it.
Explanation
Recursively enumerable language refers to a class of languages for which a Turing machine will accept and halt on strings in the language, but may not halt on strings outside it.
Source: Theory of Computation (Automata) Official Reference Guide
Tags: computer science, automata theory, theory of computation, formal languages
Submitted by: MCQsHub Editorial
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