Answer:
D
Step-by-step explanation:
The attributes of an operating system are :
- A software which controls the CPU and hardware.
- Operating system(OS) is stored on the hard drive and controls the hardware.
- CPU is the brain of the computer and operating system is the brain of CPU which controls all the functionality of the computer.
- Without an operating system our machine is a simple hardware. The connectivity between hardware and and OS must be ensured for an effective working of a machine.
- Examples of OS are iOS, Android, Windows, Apple Macintosh