Computer Components
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Questions and Answers

What is the primary function of a trackball?

  • To provide an alternative to a keyboard.
  • To move the pointer on the screen using a ball and sensor. (correct)
  • To track the movement of the user's hand.
  • To improve the sound quality of the computer.

    • What is the main advantage of an optical mouse over a mechanical mouse?

  • It is more expensive and has a higher performance.
  • It is more reliable and requires less maintenance. (correct)
  • It is more suitable for use on rough surfaces.
  • It is more ergonomic and comfortable to use.

    • What is the primary function of a touchpad?

  • To provide a means of scanning documents.
  • To provide an alternative to a keyboard.
  • To improve the sound quality of the computer.
  • To allow the user to control the cursor on the screen using their finger. (correct)

    • What is the primary function of a touch screen?

    <p>To allow the user to interact with the device using their finger.</p> Signup and view all the answers

    What is the primary function of an optical scanner?

    <p>To scan pictures and documents and convert them into digital format.</p> Signup and view all the answers

    What is the primary function of a digital camera?

    <p>To capture images and record videos digitally.</p> Signup and view all the answers

    What is the primary function of a light pen?

    <p>To point to or select objects on the display screen.</p> Signup and view all the answers

    What is a common drawback of mechanical mice?

    <p>They are prone to dust and require regular cleaning.</p> Signup and view all the answers

    What is a characteristic of cordless or wireless mice?

    <p>They use wireless technology to control the movement of the cursor.</p> Signup and view all the answers

    What is a consideration when using an optical mouse?

    <p>The surface on which it is used can affect its performance.</p> Signup and view all the answers

    What is the primary purpose of cache memory?

    <p>To synchronize with high-speed CPU and improve its performance</p> Signup and view all the answers

    What is a characteristic of a hard disk?

    <p>It is a rigid magnetic disc that permanently stores data</p> Signup and view all the answers

    What is another name for a pen drive?

    <p>USB flash drive</p> Signup and view all the answers

    What is the shape of a compact disk?

    <p>Circular</p> Signup and view all the answers

    What is the material used to make a compact disk?

    <p>Polycarbonate plastic</p> Signup and view all the answers

    What is the benefit of using a pen drive?

    <p>It is commonly used to store and transfer data between computers</p> Signup and view all the answers

    What is the primary function of a processor in a computer system?

    <p>To convert analogue data into digital data</p> Signup and view all the answers

    Which of the following is NOT a main component of a computer system?

    <p>Printer</p> Signup and view all the answers

    What is the primary feature of a Daisy Wheel Printer?

    <p>It has a wheel or disk with spokes or extensions and molded metal characters.</p> Signup and view all the answers

    What is the primary advantage of a Dot Matrix Printer over a Daisy Wheel Printer?

    <p>It is faster and more quiet.</p> Signup and view all the answers

    What is the purpose of an input device in a computer system?

    <p>To send data or information to the computer</p> Signup and view all the answers

    Which type of keyboard is considered the standard French keyboard?

    <p>AZERTY</p> Signup and view all the answers

    What is the primary function of the print head in an Inkjet Printer?

    <p>To spray fine ionized drops of ink onto the paper.</p> Signup and view all the answers

    What is the primary advantage of the DVORAK keyboard layout?

    <p>It reduces finger movement while typing</p> Signup and view all the answers

    What is the primary difference between a Laser Printer and an Inkjet Printer?

    <p>The method of printing characters.</p> Signup and view all the answers

    What is the function of a mouse in a computer system?

    <p>To move the cursor or pointer on the screen</p> Signup and view all the answers

    What is the primary use of a Plotter?

    <p>To generate high-quality, accurate, and detailed graphics.</p> Signup and view all the answers

    What is the primary characteristic of a Laser Printer?

    <p>It uses a laser beam to print characters.</p> Signup and view all the answers

    What is a common feature of some mouse devices?

    <p>Extra buttons to perform different functions</p> Signup and view all the answers

    What is the primary function of primary memory in a computer system?

    <p>To store data temporarily</p> Signup and view all the answers

    What is the primary advantage of a Laser Printer over an Inkjet Printer?

    <p>It uses powdered toner for printing.</p> Signup and view all the answers

    What is the main difference between QWERTY and AZERTY keyboards?

    <p>The placement of letters and emphasis on accents</p> Signup and view all the answers

    What is the primary function of the drum in a Laser Printer?

    <p>To draw the image on the drum using a laser beam.</p> Signup and view all the answers

    What is the function of a trackball mouse?

    <p>To move the cursor or pointer on the screen using a ball mechanism</p> Signup and view all the answers

    What is the primary difference between a Plotter and a Printer?

    <p>The use of a pen or marker to draw continuous lines.</p> Signup and view all the answers

    What is the primary advantage of a Plotter over a Printer?

    <p>It is capable of handling large-format prints and delivering precise output.</p> Signup and view all the answers

    What is the primary function of a joystick?

    <p>To control the cursor or pointer on a screen</p> Signup and view all the answers

    What is the main purpose of a microphone?

    <p>To input sound into a computer</p> Signup and view all the answers

    What is the primary function of Magnetic Ink Character Recognition (MICR)?

    <p>To read text printed with magnetic ink</p> Signup and view all the answers

    What is the primary function of a monitor?

    <p>To display the output of a computer</p> Signup and view all the answers

    What is the primary function of speakers?

    <p>To transform electrical impulses into audible sounds</p> Signup and view all the answers

    What is the primary function of a projector?

    <p>To display the output of a computer on a screen</p> Signup and view all the answers

    What is the primary function of a printer?

    <p>To produce hard copies of processed data</p> Signup and view all the answers

    What is the primary function of a joystick?

    <p>To control the cursor or pointer on a screen</p> Signup and view all the answers

    What is another name for the Central Processing Unit (CPU)?

    <p>Microprocessor</p> Signup and view all the answers

    What is the primary function of Magnetic Ink Character Recognition (MICR)?

    <p>To read text printed with magnetic ink</p> Signup and view all the answers

    What is the primary function of a monitor?

    <p>To display the output of a computer</p> Signup and view all the answers

    What does the CPU carry out in a computer?

    <p>All important functions of a computer</p> Signup and view all the answers

    What is the main function of the Arithmetic Logic Unit (ALU)?

    <p>To carry out arithmetic and logical operations</p> Signup and view all the answers

    What is the Control Unit (CU) responsible for?

    <p>The overall performance of a computer</p> Signup and view all the answers

    What is the primary function of the memory or storage unit?

    <p>To maintain instructions, data, and intermediate outcomes</p> Signup and view all the answers

    What is the main difference between ROM and RAM?

    <p>ROM can only be read, while RAM can be written and read</p> Signup and view all the answers

    What happens to the data in RAM when the computer is shut down?

    <p>The data is lost</p> Signup and view all the answers

    What is the benefit of loading data into RAM?

    <p>Reading data from RAM is much faster than reading from the hard drive</p> Signup and view all the answers

    What is the primary function of the CPU in a computer system?

    <p>To receive instructions and produce output</p> Signup and view all the answers

    Study Notes

    Computer Components

    • Computers process both analogue and digital data
    • Processors are used in various applications like petrol pumps, airplanes, hospitals, and scientific applications

    Main Computer Components

    • Input devices (e.g. keyboard, mouse, touchpad, touch screen)
    • Central Processing Unit (CPU)
    • Output devices (e.g. monitor, speakers, projector, printer)
    • Primary memory (RAM, ROM)
    • Secondary storage (hard drives, SSDs)

    Input Devices

    • Keyboard: QWERTY, AZERTY, DVORAK layouts
    • Mouse: Trackball, Mechanical, Optical, Cordless/Wireless
    • Touchpad: Found in laptops, allows cursor control with finger
    • Touch Screen: Allows direct interaction with display
    • Scanner: Converts physical documents/images to digital form
    • Digital Camera: Captures and stores images/videos digitally
    • Light Pen: Pen-shaped input device, detects screen location
    • Joystick: Used for cursor control, common in gaming
    • Microphone: Converts sound to digital audio signals
    • MICR: Reads magnetically-inked text, used for cheque processing

    Output Devices

    • Monitor: CRT, LCD, LED, Plasma displays
    • Speakers: Produce audio output
    • Projector: Projects computer output onto large screen
    • Printer: Daisy wheel, Dot matrix, Inkjet, Laser printers
    • Plotter: Creates high-quality, precision graphical output

    Central Processing Unit (CPU)

    • Carries out instructions, performs calculations, manipulates data
    • Arithmetic Logic Unit (ALU): Performs arithmetic and logical operations
    • Control Unit (CU): Coordinates and controls other computer components

    Memory/Storage

    • ROM (Read-Only Memory): Permanently stores data/programs
    • RAM (Random Access Memory): Volatile memory, stores active data/programs### Cache Memory
    • High-speed memory, small in size, but faster than main memory (RAM)
    • Allows CPU to access it quickly, improving performance
    • Synchronizes with high-speed CPU

    Hard Disk

    • Rigid magnetic disc used to store data
    • Permanently stores data and is located within a drive unit

    Pen Drive

    • Compact secondary storage device
    • Known as USB flash drive, thumb drive, or jump drive
    • Connects to a computer via a USB port
    • Used to store and transfer data between computers
    • Can store documents, pictures, music, videos, and more

    Compact Disk (CD)

    • Portable secondary storage device in the shape of a round medium disk
    • Made of polycarbonate plastic
    • Co-developed by Philips and Sony in 1980

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    Description

    This quiz covers the basics of computer components, including input devices, CPU, output devices, primary memory, and secondary storage. Learn about the different types of computer components and their functions.

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