Computer Components
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Questions and Answers

What is the primary function of cache memory?

  • To connect to a computer via a USB port
  • To store permanent data
  • To store and transfer data between computers
  • To synchronize with high-speed CPU and improve its performance (correct)

    • What is a hard disk?

  • A compact secondary storage device
  • A portable storage device in the shape of a round medium disk
  • A high-speed memory that is small in size
  • A rigid magnetic disc that stores data permanently (correct)

    • What is another name for a pen drive?

  • Cache memory
  • Hard disk
  • Compact disk
  • USB flash drive (correct)

    • What is the primary use of a pen drive?

    <p>To store and transfer data between computers</p> Signup and view all the answers

    What is the shape of a compact disk?

    <p>A round medium disk</p> Signup and view all the answers

    Who co-developed the concept of a compact disk?

    <p>Philips and Sony</p> Signup and view all the answers

    What is the primary function of a touchpad?

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

    What type of mouse is more reliable and requires less maintenance?

    <p>Optical mouse</p> Signup and view all the answers

    What is the main advantage of a cordless mouse?

    <p>It does not require a cable to operate</p> Signup and view all the answers

    What is the primary function of an optical scanner?

    <p>To scan pictures and pages of text as input</p> Signup and view all the answers

    What is the name of the technology used in cordless mice to control the movement of the cursor?

    <p>All of the above</p> Signup and view all the answers

    What is the main difference between a mechanical mouse and an optical mouse?

    <p>The type of technology used to track its movement</p> Signup and view all the answers

    What is the function of the light-sensitive detector in a light pen?

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

    What is the primary function of a touch screen?

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

    What is the main advantage of using a touchpad over a mouse?

    <p>It requires less desk space</p> Signup and view all the answers

    What is the main limitation of using a light pen?

    <p>It is not compatible with LCD screens</p> Signup and view all the answers

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

    <p>To convert measurements into quantity and price</p> Signup and view all the answers

    What are the three main building blocks of a computer system?

    <p>CPU, memory, and output devices</p> Signup and view all the answers

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

    <p>To send data, information, or control signals to the CPU</p> Signup and view all the answers

    What is the most common type of keyboard used with computers?

    <p>QWERTY keyboard</p> Signup and view all the answers

    What is the primary 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 main advantage of the DVORAK keyboard layout?

    <p>It reduces finger movement while typing to increase typing speed</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 main difference between the AZERTY and QWERTY keyboard layouts?

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

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

    <p>To process data and produce output</p> Signup and view all the answers

    What are the five main components of a computer system?

    <p>Input devices, CPU, memory, output devices, and secondary storage</p> Signup and view all the answers

    What is the main characteristic of a Daisy Wheel Printer?

    <p>It uses a wheel with spokes and metal characters to print.</p> Signup and view all the answers

    What is the main advantage of a Dot Matrix Printer?

    <p>It has a high speed of around 200-500 characters per second.</p> Signup and view all the answers

    What is the mechanism used by an Inkjet Printer to print images and characters?

    <p>It sprays fine, ionized drops of ink onto the paper.</p> Signup and view all the answers

    What is the main characteristic of a Laser Printer?

    <p>It uses a laser beam to draw the image on the drum.</p> Signup and view all the answers

    What is the main advantage of a Plotter?

    <p>It can handle large-format prints and deliver precise output.</p> Signup and view all the answers

    Which type of printer is commonly used in fields like engineering, architecture, and graphic design?

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

    What is the resolution of a Laser Printer?

    <p>At least 600 dots per inch (dpi)</p> Signup and view all the answers

    What is the mechanism used by a Dot Matrix Printer to print characters?

    <p>It strikes the ink ribbon against the paper with a print head.</p> Signup and view all the answers

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

    <p>A Plotter uses a pen or marker to draw, while a Printer uses ink or toner.</p> Signup and view all the answers

    What is the main disadvantage of a Daisy Wheel Printer?

    <p>It is slow and noisy.</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 purpose of a microphone?

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

    What is MICR used for?

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

    What is the main function of a monitor?

    <p>To display the processed data or information</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 purpose of a projector?

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

    What is the primary function of a printer?

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

    What type of ink is used in MICR technology?

    <p>Magnetic ink</p> Signup and view all the answers

    What is the purpose of a computer output device?

    <p>To display the result of the processing of raw data</p> Signup and view all the answers

    What is the advantage of using speakers in a computer system?

    <p>To improve the multimedia experience by providing high-quality audio output</p> Signup and view all the answers

    What is the primary function of the Central Processing Unit (CPU)?

    <p>To carry out all the important functions of a computer</p> Signup and view all the answers

    What is the Arithmetic Logic Unit (ALU) responsible for?

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

    What is the Control Unit (CU) responsible for?

    <p>Controlling the overall performance of the computer system</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 ROM (Read Only Memory)?

    <p>A type of memory that can only be read</p> Signup and view all the answers

    What is the primary function of RAM (Random Access Memory)?

    <p>To act as an internal memory of the CPU</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>It allows the CPU to access data more quickly</p> Signup and view all the answers

    What is the CPU responsible for executing?

    <p>Instructions from both the hardware and software</p> Signup and view all the answers

    What is the primary function of the ALU in a CPU?

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

    Study Notes

    Computer Components

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

    Main Computer Components

    • Input devices: Enable user to send data/information/control signals to the computer

      • Keyboard: Used to enter data, different keyboard layouts like QWERTY, AZERTY, DVORAK
      • Mouse: Hand-held device to move cursor, types include trackball, mechanical, optical, wireless
      • Touchpad: Found in laptops to control cursor using finger
      • Touchscreen: Display that allows interaction using fingers
      • Scanners, digital cameras, light pens, joysticks, microphones are other input devices

    • Output Devices: Display processed data as text, images, audio, or video

      • Monitor: Main display unit for computers
      • Speakers: Transform electrical impulses to audible sound
      • Projector: Projects output onto a large screen
      • Printers: Produce hard copies of data, types include daisy wheel, dot matrix, inkjet, laser
      • Plotter: Creates high-quality, accurate graphics and drawings

    • Central Processing Unit (CPU)

      • Executes instructions and coordinates all computer components
      • Has Arithmetic Logic Unit (ALU) for computations and Control Unit (CU) to manage operations

    • Memory/Storage

      • ROM (Read-Only Memory): Stores permanent data and programs
      • RAM (Random Access Memory): Temporary storage for data and programs being used### Cache Memory

    • Cache memory is a high-speed memory that is small in size but faster than the main memory (RAM).

    • The CPU can access it more quickly than the primary memory, making it ideal for synchronizing with high-speed CPU and improving its performance.

    Hard Disk

    • A hard disk is a rigid magnetic disc used for storing data.
    • Data is permanently stored on the disk, which is located within a drive unit.

    Pen Drive

    • A pen drive is a compact secondary storage device.
    • It is also known as a USB flash drive, thumb drive, or jump drive.
    • It connects to a computer via a USB port and is used to store and transfer data between computers.
    • It is commonly used to store and transfer files, documents, pictures, music, and videos.

    Compact Disk (CD)

    • A Compact Disk is a portable secondary storage device in the shape of a round medium disk.
    • It is made of polycarbonate plastic and was co-developed by Philips and Sony in 1980.

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    Description

    Learn about the main components of a computer, including input devices like keyboards and mice, and their applications.

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