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 question asks: 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 correct choice is B. Semaphore. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Operating Systems 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 Operating Systems 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 Operating Systems 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. Kernel
Why not A: “Kernel” does not fit this question. The answer is Semaphore.
- B. Semaphore ✓
- C. Thread
Why not C: “Thread” does not fit this question. The answer is Semaphore.
- D. Paging
Why not D: “Paging” does not fit this question. The answer is Semaphore.
Correct answer
B. Semaphore
Explanation
Semaphore (option B) is the accepted answer to “The following statement describes a specific concept. What is it called? a synchronization variable used to control access to shared resources by multiple processes.”. Option A (Kernel) does not fit this question. Option C (Thread) does not fit this question. Option D (Paging) does not fit this question. For this Operating Systems question, the accepted answer is Semaphore.
Source: Operating Systems Official Reference Guide
Tags: computer science, operating systems, OS concepts, process management
Submitted by: MCQsHub Editorial
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