THE FUNCTIONS OF AN OPERATING SYSTEM (1.Starting the computer (The…
THE FUNCTIONS OF AN OPERATING SYSTEM
1.Starting the computer
The process of starting or restarting a computer is called booting.
Turning on a computer that has been powered off completely.
The process of using the operating system to restart a computer
2.Provide a user interface
A user interface controls how users enter data and instructions and how information is displayed on the screen.
Graphical User Interface (GUI):
user interacts with menus and visual images.
user uses the keyboard to enter data and instructions.
An OS manages multiple programs and processes while you use the computer.
Purpose - to optimize the use of RAM
OS allocates data & instructions to memory while being processed, monitors the contents of memory, and release from memory when the processor no longer requires them.
management optimizes the use of RAM.
is a portion of a storage medium functioning as additional RAM.
Coordinating tasks and configure devices
I.OS determines the order in which jobs are processed.
II.A job is an operation the processor manages.
III.Jobs include receiving data from input device, processing instructions, sending information to output device and transferring items between storage and memory.
A device driver is a small program that tells the operating system how to communicate with a specific device
Plug and Play automatically configures new devices as you connect them
Establish an Internet connection
OS provides a means to establish Internet connection.
OS typically contains a performance monitor.
A performance monitor is a program that assesses and reports information about various computer resources and devices.
Provide File Management And Other Utilities
Utility programs which included in most OS provide the following functions :
Securing A Computer From Unauthorized Access
Backing Up Files And Disks
Setting Up Screen Savers
Control a network
Organizes and coordinates how multiple users access and share resources on a network
Resources – hardware, software, data, and information
Example : printer, Internet access, files and programs.
Establish permissions to resources
Define who can access certain resources and when they can access those resources
By setting user account
Many programs, including operating system, include an automatic update feature that regularly provides new features or corrections to the program