Theory of Computation (Automata)
Which concept is defined as follows: the undecidable problem of determining whether a given program will finish running or continue forever?
Difficulty: Hard
About this MCQ
This Hard Theory of Computation (Automata) question asks: Which concept is defined as follows: the undecidable problem of determining whether a given program will finish running or continue forever? The correct choice is A. Halting problem. 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.
Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Theory of Computation (Automata) item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.
- A. Halting problem ✓
- B. Deterministic finite automaton (DFA)
Why not B: “Deterministic finite automaton (DFA)” does not fit this question. The answer is Halting problem.
- C. Context-free grammar
Why not C: “Context-free grammar” does not fit this question. The answer is Halting problem.
- D. Alphabet
Why not D: “Alphabet” does not fit this question. The answer is Halting problem.
Correct answer
A. Halting problem
Explanation
Halting problem is the term that matches “Which concept is defined as follows: the undecidable problem of determining whether a given program will finish running or continue forever” (option A). Option B (Deterministic finite automaton (DFA)) does not fit this question. Option C (Context-free grammar) does not fit this question. Option D (Alphabet) does not fit this question. For this Theory of Computation (Automata) question, the accepted answer is Halting problem.
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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