Theory of Computation (Automata)
Which term 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?
Difficulty: Hard
About this MCQ
This Hard Theory of Computation (Automata) question asks: Which term 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? The correct choice is C. Recursively enumerable language. 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. Universal Turing machine
Why not A: “Universal Turing machine” does not fit this question. The answer is Recursively enumerable language.
- B. String (formal language)
Why not B: “String (formal language)” does not fit this question. The answer is Recursively enumerable language.
- C. Recursively enumerable language ✓
- D. Pumping lemma
Why not D: “Pumping lemma” does not fit this question. The answer is Recursively enumerable language.
Correct answer
C. Recursively enumerable language
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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