The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.
Difficulty: Hard
About this MCQ
This Hard Operating Systems MCQ checks one syllabus fact.
The question is: “The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.”
The accepted answer is B. Semaphore. “The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.” is answered by Semaphore (option B). Option A (“Kernel”) does not match the stem; it is a near-miss used to catch incomplete recall of Semaphore. Option C (“Thread”) does not match the stem; it is a near-miss used to catch incomplete recall of Semaphore. Remaining alternatives (Paging) fall outside the same rule and should be eliminated once Semaphore is identified. Operating Systems questions of this type reward precise definitions rather than approximate associations. Operating Systems recall of this distinction is a regular item in FPSC, PPSC, NTS, and CSS papers.
- A. Kernel
Why not A: “Kernel” is not correct. The accepted answer is B. Semaphore. “The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.” is answered
- B. Semaphore ✓
- C. Thread
Why not C: “Thread” is not correct. The accepted answer is B. Semaphore. “The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.” is answered
- D. Paging
Why not D: “Paging” is not correct. The accepted answer is B. Semaphore. “The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.” is answered
Correct answer
B. Semaphore
Explanation
“The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.” is answered by Semaphore (option B). Option A (“Kernel”) does not match the stem; it is a near-miss used to catch incomplete recall of Semaphore. Option C (“Thread”) does not match the stem; it is a near-miss used to catch incomplete recall of Semaphore. Remaining alternatives (Paging) fall outside the same rule and should be eliminated once Semaphore is identified. Operating Systems questions of this type reward precise definitions rather than approximate associations. Operating Systems recall of this distinction is a regular item in FPSC, PPSC, NTS, and CSS papers.
Source: Operating Systems Official Reference Guide
Tags: computer science, operating systems, OS concepts, process management
Submitted by: MCQsHub Editorial
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