Which of the following statements is correct?

Question

BlackTom AI · Accepted Answer

An operating system is system software that coordinates and controls all of a computer’s hardware and core software resources (CPU scheduling, main memory, file systems, device drivers, process management, I/O, security and user interfaces), while a utility program is an application designed to perform one or a few specialized maintenance or support tasks (disk defragmentation, file compression, antivirus scanning, backup, file managers).

1. Relevant knowledge points and concepts
- Operating system (OS): global resource manager responsible for many resources simultaneously (CPU, RAM, storage, I/O devices, processes, user sessions, security).
- Utility program: focused tool that performs specific maintenance or management functions, usually operating on a limited resource set (e.g., disk utilities manage storage and files; print utilities manage printing; antivirus primarily inspects files and memory).

2. Step-by-step reasoning
- Identify scope of OS: The OS must allocate CPU time among processes, manage memory allocation and protection, handle file system access, control device drivers, and enforce security—this is a large, coordinated set of resources.
- Identify scope of utilities: Utilities are written to solve discrete problems (compress files, back up data, scan for malware). Each utility typically interacts with only one or a few resource types (storage, files, or network).
- Compare scopes: Because the OS has broad, system-wide responsibilities and utilities are targeted, the correct relationship is that an OS manages many resources while utilities manage one or two.

3. Calculations
- None required for this conceptual question.

4. Why the correct answer is correct
- Option c correctly captures the differing scopes: the OS is comprehensive; utilities are specialized.

5. Why other options are incorrect
- a reverses the roles (incorrect).
- b falsely claims utilities do not manage resources; they do manage specific resources (e.g., disk utilities manage storage).
- d wrongly states they perform exactly the same tasks; utilities supplement but do not replace OS-wide management.

6. Conclusion
- Therefore the correct choice is c. This matches the provided answer: "An operating system manages a large number of resources while a utility program only manages one or two resources."

Which of the following statements is correct?单项选择题

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