Operating system

Operating system

1. A operating system is the low-level software that supports a computer's basic functions, such as scheduling tasks and controlling peripherals.

2. The purpose of a operating system An operating system (OS) is software that manages computer hardware and software resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function.

3. The most common operating systems used today are, The most common one is called ITRON which is Japanese, which was launched in 1984. Another common operating system is windows 7.

4. Functions of a operating system are: controls the backing store and peripherals such as scanners and printers. deals with the transfer of programs in and out of memory. organises the use of memory between programs. organises processing time between programs and users. maintains security and access rights of users. deals with errors and user instructions. allows the user to save files to a backing store. provides the interface between the user and the computer - for example, Windows Vista and Apple OSX. For more information. issues simple error messages

5. Allowing the user to control the computer in someway.

6. The user of the computer pushes the power button to boot the computer up.

7. The file management allows the user to edit files on the computer.

8. The management of the computer is where all the important files were saved and the user of the computer can operate them.

9. Managing the hardware and software: It provides common services for computer programs.

10. What other things does

11. ◾Booting the computer. ◾Performs basic computer tasks eg managing the various peripheral devices eg mouse, keyboard. ◾Provides a user interface, e.g. command line, graphical user interface (GUI)

12. In computing, a graphical user interface is a type of interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, as opposed to text-based interfaces, typed command labels or text navigation.

13. it can be user-friendly and speed up the user's work. - it can be more attractive for non-technical people. - in general, it looks more professional (but this does not mean it is always the best solution). The Advantages

14. The disadvantages of a GUI: It is slower than CUI based operating system because of graphics. ◾It cannot run on old computer system, it has hardware and software compatibility. ◾Most of the GUI based operating systems are expensive: users have to pay for licensee or to buy it.

15. What is a CLI: The CLI was the primary means of interaction with most computer systems until the introduction of the video display terminal in the mid-1960s, and continued to be used throughout the 1970s and 1980s on Unix systems and personal computer systems including MS-DOS, CP/M and Apple DOS.

16. -Most folks that have computer technology as a career are familiar with using this interface, especially if they have a *nix background. -Requires a lower threshold for the interface. This means that a relatively simple program like telnet (available almost on all machines) is all you need to interface via CLI. -Easy to integrate with scripting, and other programmatic interfaces. -They can be quite powerful in the right hands. Piping multiple commands together, parsing feedback, etc. -Many of the most common CLI executables in the *nix world are consistently ported, so there is a lot of consistency across systems. The advantages of a CLI.

    • The disadvantages of a CLI: Disadvantages of CLI: -Not intuitive, especially to a lay user. -No media. -Complex combinations can be difficult to remember, and slower to type (but that is on a task by task basis, as often you can perform tasks faster with CLI)