Exam-style question
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Which statement best describes one role of an operating system?.
- A.It hides the complexities of the hardware from software and users.
- B.It replaces all hardware components with software versions.
- C.It ensures that every process uses every hardware device at the same time.
- D.It prevents programs from using processors, memory and I/O devices.
Model answer
What a good answer should say
- It hides the complexities of the hardware from software and users.
Explanation
Why this works
The operating system provides an abstraction of the hardware, hiding its complexities. It also manages the allocation of hardware resources.
Common mistake
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