Which of the following problems is decidable?
Options
- A. General Halting Problem
- B. Post Correspondence Problem
- C. Checking whether a given integer is even
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
C. Checking whether a given integer is even
Detailed Explanation
- Even Number Checking: A decidable problem because an algorithm can determine divisibility by 2 and always terminate.
- General Halting Problem: Undecidable.
- Post Correspondence Problem: Undecidable in its general form.
- Exam Tip: Do not confuse undecidable problems with problems that are merely computationally expensive.