Post on 07-Apr-2018
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2.0 Basic OS ConceptManagement
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Types of Interfaces
1. Command Interface
2. Menu Interface
3. Graphical User Interface
4. Voice-actuated interface
5. Web-form interface
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Types of Interface :1) Command Interface
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Types of Interface :1) Command Interface cont
y An interface that accepts types commands, one lineat a time from the user
y Contras with a menu driven interface
y
E.g.: MS-DOS , UNIX operating system
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Types of Interface :1) Command Interfacecont
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Types of Interface :2) Menu Interface
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Types of Interface :2) Menu Interfacecont
y An interface that accept instructions that userchoose from menu of valid choice
y User often use mouse to point & click on the choseninstruction
y Contrast with a command-driven interface
y E.g.: Windows 2000
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Types of Interface :2) Menu Interfacecont
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Types of Interface :3) Graphical User Interface
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Types of Interface :3) Graphical User Interfacecont
y Auser interface that allows the user to activate OScommand by clicking on a desktop icon usingpointing device such as mouse or touch screen.
y GUIs evolved from command driven userinterface.
y User often use mouse to point & click on the chosen
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Types of Interface :3) Graphical User Interfacecont
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Types of Interface :4) Voice-Actuated Interface
y Enables a user to use simple voice command tocontrol physical environmental.
y E.g.: The computer includes a voice card &associated voice recognition & training software forinterpreting & translating voice input into digitalinformation readable by controller card for
operating equipments @ control the environment.
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Types of Interface :5) Web-form Interface
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Types of Interface :5) Web-form Interfacecont
y Allow user to enter data that is send to a server forprocessing
y Web form interface resembles paper form becauseuser need to fill out the form using web formelements
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Types of Interface :5) Web-form Interfacecont
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Basic Functions Perform byOS User Interface
1. Enable user to interact with the system
2. How to interact? By perform the user command
interface /instructions from various types ofinterfaces.
3. Medium are used ; display screen, keyboard,
mouse, light pen, the appearance of a desktop,illuminated characters or help messages.
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Boot Process
y Booting up is a bootstrapping process that starts OS whenthe user turns on a computer system
y Booting is the process of starting or restarting a computer
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Type of Boot Process
1. Cold Boot
2. Warm Boot
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Type of Boot Process : Cold Boot
y When turning on a computer that has beenpowered off completely.
y Example : by press power button.
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Type of Boot Process :Warm Boot
y Is the process of restarting a computer that alreadyis powered on.
y Example : In Windows XP, warm boot can beperform by : pressing combination of (CTRL + ALT +DEL)
selecting a button or an option from a list in a
dialog box pressing the reset button on the computer
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How a PC Boots Up
1. The power supplysend a signal to the component s inthe system unit
2. The processor finds the ROM chip(s) that contain theBIOS (basic input output system)
3. The BIOS performs the POST(power-on self test),which checks components such as mouse, keyboard
and adapter cards.
4. The results of the POST are compared with data in aCMOS chip
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5. The BIOS looks for the system file in drive A(floppydisk drive), sometimes a CD or DVD drive & thendrive C (hard disk)
6. The system file and the kernel of the OS load intomemory (RAM) from storage (hard disk)
7. The OS loads configuration information, mayrequest user information & display the desktop onthe screen.