220.127.116.11 describe the purpose and main functions of operating systems
The OS acts like a bridge between the applications software and the computer hardware. Users need applications software to carry out tasks? the software needs the operating system in order to communicate with the hardware.
The main functions of the operating system:
The OS controls the operation of the processor and memory, by managing the resources so that each application is allocated enough processor time and power, memory and hard drive space to complete its job. In this, the OS is like a referee, making sureeveryone plays a fair game.
The OS controls any peripherals, like printers, scanners, barcode readers that are attached to the computer. It will use specialised drivers to ensure that the right instructions are passed in a way that the device can operate.
The OS controls security - logins and sometimes basic firewalls and anti-virus facilities are run through the OS.
The OS provides a foundation for all application software to run, allowing software developers to write for an operating system rather than for a computer design, as was the case in the early years of computer development. This is because each OS has a standardised API (application program interface).
Examples of OS: Windows, Mac OS, Linux, Unix, MS-DOS, Android, iOS and other.
Ex. 3 (Author: Dyusegaliyeva Nassipzhan- CS teacher of NIS PhM Nur-Sultan)
Ex. 4 (Author: Adikova Aida - CS teacher of NIS PhM Nur-Sultan)
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