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Chapter 5: Defining the Role of the Operating System

Chapter 5: Defining the Role of the Operating System. Computer Literacy. Introduction. Operating System Functions Capabilities and Limitations of an OS Common OS Problems and Their Solutions. Operating System Functions. Create and maintain user interface Manage system hardware

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Chapter 5: Defining the Role of the Operating System

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  1. Chapter 5:Defining the Role ofthe Operating System Computer Literacy

  2. Introduction • Operating System Functions • Capabilities and Limitations of an OS • Common OS Problems and Their Solutions

  3. Operating System Functions • Create and maintain user interface • Manage system hardware • Organize and maintain files • Act as a bridge between applications and hardware • Provide Security

  4. Create the User Interface • On-screen prompts and objects that enable you to interact with the computer

  5. Create the User Interface • On-screen prompts and objects that enable you to interact with the computer • The gateway to everything the computer offers

  6. Manage System Hardware • BIOS for core hardware • Software programs (device drivers) for other hardware

  7. Organize and Maintain Files • Files • File types • File extensions (i.e. .doc, .jpg, .html) • Unique icons • Folders

  8. Bridge the Hardware and Applications • Operating system enables applications to communicate with hardware • “Program support”

  9. Capabilities and Limitations of an OS • GUI-based • Character-based

  10. Character-based User Interface • Prompt: c:\> • Type commands: c:\>dir • Press [Enter] to make the commands go

  11. Graphical User Interface • Point and click on icons • Just like typing a command • To the computer, it’s the same thing!

  12. Major Operating Systems • Command-line • DOS • Linux • UNIX • GUI • Windows • Macintosh OS X • Linux • UNIX

  13. Microsoft Windows • Graphical interface • Command-line interface as well • Windows 9x • Windows NT • Windows 2000 • Windows XP • Windows Vista • Windows 7

  14. Apple Macintosh • Currently at OS X (ten, not ex) • Graphical interface • Command-line interface as well

  15. UNIX and Linux • Command-line interface • Graphical (overlay) interface

  16. Handheld Operating Systems • Smartphones • PDAs • Portable video and music players • e-book readers

  17. OS Limitations • Software support • Programs work for only one OS • Most programs written for Windows • Hardware support • Most hardware today works for Windows and Linux • Macintosh somewhat proprietary • Case sensitivity

  18. Common OS Problems • Instability • System runs slowly • System locks up • Blue screen of death • Computer starts in Safe mode

  19. Common OS Problems • Fixing Instability • Drive scanning • Go to Computer, right-click the drive, select Properties • In Properties, select Tools tab then click Check Now

  20. Common OS Problems • Instability caused by fragmentation • Computer runs slowly • Computer accesses hard drive frequently • Fix by defragmenting the disk, or “defrag”

  21. Common OS Problems

  22. Common OS Problems • Failure to start • Safe Mode • System Restore

  23. Common OS Problems • Access Denied • Check [Caps Lock] key • You may not have the proper permissions (standard vs. administrator account) • Try again, carefully

  24. Summary • Operating System Functions • Capabilities and Limitations of an OS • Common OS Problems and Their Solutions

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