A programmatic way for an application to request a service from the operating system's kernel. What is this concept called?
Difficulty: Medium
About this MCQ
This Medium Operating Systems MCQ checks one syllabus fact.
The question is: “A programmatic way for an application to request a service from the operating system's kernel. What is this concept called?”
The accepted answer is B. System call. “A programmatic way for an application to request a service from the operating system's kernel. What is this concept called” is answered by System call (option B). Option A (“Mutex”) does not match the stem; it is a near-miss used to catch incomplete recall of System call. Option C (“Memory segmentation”) does not match the stem; it is a near-miss used to catch incomplete recall of System call. Remaining alternatives (Round robin scheduling) fall outside the same rule and should be eliminated once System call 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. Mutex
Why not A: “Mutex” is not correct. The accepted answer is B. System call. “A programmatic way for an application to request a service from the operating system's kernel. What is this concept called” is answered by System call (option B). Option A (“Mutex
- B. System call ✓
- C. Memory segmentation
Why not C: “Memory segmentation” is not correct. The accepted answer is B. System call. “A programmatic way for an application to request a service from the operating system's kernel. What is this concept called” is answered by System call (option B). Option A (“Mutex
- D. Round robin scheduling
Why not D: “Round robin scheduling” is not correct. The accepted answer is B. System call. “A programmatic way for an application to request a service from the operating system's kernel. What is this concept called” is answered by System call (option B). Option A (“Mutex
Correct answer
B. System call
Explanation
“A programmatic way for an application to request a service from the operating system's kernel. What is this concept called” is answered by System call (option B). Option A (“Mutex”) does not match the stem; it is a near-miss used to catch incomplete recall of System call. Option C (“Memory segmentation”) does not match the stem; it is a near-miss used to catch incomplete recall of System call. Remaining alternatives (Round robin scheduling) fall outside the same rule and should be eliminated once System call 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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