Answer to Lesson 7 - Running head Understanding Operating...

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Running head: Understanding Operating System Understanding Operating System Name: Institution: Course: Date:
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Understanding Operating System 2 Lesson 7 Question 4. Graphical User Interfaces allows the computer users to interact with the system in a friendly way. Unlike in other Operating Systems which cannot run without the GUI e.g. Windows, the Unix GUI is a separate layer on top of the core system. It means that it’s possible to uninstall the GUI in Unix, and the system will still work. Users who were not used to Unix command line could not interact with the system traditionally. Nowadays, the development of dialog and Zenity tools which offers most of the controls used in a graphical application, allows users to use dialog boxes, file browsers among the many windowing controls provided and has made users more comfortable with this system.[Ann08] Users can present information, ask for responses and react to them, choose dates, display menus and so on and hence the development of desktop applications is now possible. Furthermore, the X Window system that is an underlying layer on UNIX provides the facilities required for a GUI to function such as accepting input from keyboards, mouse, drawing graphical objects on the screen and so on.[Ann08] Question 11. Information in a computer system is stored in files organized into directories. Some directories and archives hold information personal to the overall functioning of the system and hence access to such files by hackers or errant users could lead to system breakdown, users can also delete such files unintentionally leading to information loss. Access to information such as administrator’s passwords by errant users can bring much damage to the system. Other
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