Which of the following options describe functions of an operating system?i. Graphical user interfaceii. Antivirusiii. File managementiv. Word processingv. Disk defragmentation

Question

BlackTom AI · Accepted Answer

An operating system's core roles are to manage hardware resources, organize and control access to data, provide a user interface, and supply system utilities for maintaining the computer. These knowledge points determine which items in the list are OS functions.

1) Relevant concepts
- Graphical user interface (GUI): part of the OS that lets users interact with the machine visually (windows, icons, menus).
- File management: OS responsibility for creating, deleting, organizing, and controlling access to files and directories.
- Disk defragmentation: a system utility that reorganizes file storage to improve performance; typically provided as a system tool tied to the file system.
- Antivirus: security software that detects/removes malware—usually an additional application (though some modern OSes bundle basic protection).
- Word processing: an application program for creating/editing documents, not an OS function.

2) Step‑by‑step reasoning
- i (Graphical user interface): included. The OS supplies the GUI or a framework for it (window manager, desktop environment).
- iii (File management): included. File systems and file I/O management are central OS duties.
- v (Disk defragmentation): included as a system utility associated with the OS’s file system maintenance tools (defrag utilities are normally shipped or supported by the OS).
- ii (Antivirus): typically not a core OS function; it is an application or third‑party service. While modern OSes may include built‑in security components, antivirus is not classically listed as an OS function.
- iv (Word processing): clearly an application program (e.g., Microsoft Word), not a function performed by the OS itself.

3) Intermediate steps / checking options
- Option a (i and iii): correct about GUI and file management but omits disk utility v, so incomplete.
- Option b (iii, iv and v): includes word processing (iv) which is an application, so incorrect.
- Option d (i, ii, v): includes antivirus (ii) which is not a fundamental OS function, so incorrect.

4) Why the correct answer is correct
Combining the core OS roles (interface + file and disk utilities) yields i, iii and v as functions the OS provides. Word processing is an application; antivirus is separate software.

Conclusion: The correct choice is c. i, iii and v, which matches the provided answer.

Which of the following options describe functions of an operating system?i. Graphical user interfaceii. Antivirusiii. File managementiv. Word processingv. Disk defragmentation单项选择题

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