CA/U2 Topic 3 Functions of Operating System
An operating system includes all the programs of a computer system that control and monitor the operations of the system. Operating systems typically consist of a kernel that manages the hardware of the computer, as well as basic system programs that are used to boot the operating system and configure it. We are going to discuss main functions of operating system.
Functions of Operating System
Operating system performs the following functions;
Booting is a process of starting the computer operating system starts the computer to work. It checks the computer and makes it ready to work.
- Memory Management
It is also an important function of operating system. The memory cannot be managed without operating system. Different programs and data execute in memory at one time. if there is no operating system, the programs may mix with each other. The system will not work properly.
- Loading and Execution
A program is loaded in the memory before it can be executed. Operating system provides the facility to load programs in memory easily and then execute it.
- Data Security
Data is an important part of computer system. The operating system protects the data stored on the computer from illegal use, modification or deletion.
- Disk Management
Operating system manages the disk space. It manages the stored files and folders in a proper way.
- Process Management
CPU can perform one task at one time. if there are many tasks, operating system decides which task should get the CPU.
- Device Controlling
Operating system also controls all devices attached to computer. The hardware devices are controlled with the help of small software called device drivers.
- Printing Controlling
Operating system also controls printing function. It a user issues two print commands at a time, it does not mix data of these files and prints them separately.
- Providing Interface
It is used in order that user interface acts with a computer mutually. User interface controls how you input data and instruction and how information is displayed on screen. The operating system offers two types of the interface to the user;
(i) Graphical-line interface: It interacts with of visual environment to communicate with the computer. It uses windows, icons, menus and other graphical objects to issues commands.
(ii) Command-line interface: It provides an interface to communicate with the computer by typing commands.