ITCS - Motherboard and Data Bus - Exercise P3

Exercise Solutions

Multiple Choice Questions

  1. Which of the following is known as the brain of a computer system?
    Answer: CPU

  2. The new __________ integrates the function of a processor, memory and video on a single chip.
    Answer: System on a Chip (SoC)

  3. A memory that is placed between CPU and main memory is __________.
    Answer: Cache Memory

  4. The speed of the hard disk is measured in __________.
    Answer: RPM (Revolutions Per Minute)

  5. A __________ is used to read handwritten or printed text to make a digital image that is stored in memory.
    Answer: Scanner

  6. Which hardware device is used to store data for a long period of time?
    Answer: Secondary Storage

  7. The box that contains the central electronic components of the computer is the __________.
    Answer: System Unit

Write the Appropriate Technical Terms for the Following

  1. The tools that allow us to interact with a computer by sending information to it.
    Answer: Input Devices

  2. A pointing input device that helps to control and interact with a computer.
    Answer: Mouse

  3. An input device that allows the user to type letters, numbers and symbols.
    Answer: Keyboard

  4. A device that captures sound and turns it into electrical signals.
    Answer: Microphone

  5. A device that copies physical documents, photos or drawings and turns them into digital files on a computer.
    Answer: Scanner

  6. The small, fast storage areas inside the CPU that temporarily hold data and instructions.
    Answer: Registers

  7. The main circuit board inside a computer that connects all the different parts.
    Answer: Motherboard

  8. A system of wires inside a computer that carries data between different parts.
    Answer: Bus (System Bus)

  9. The smallest unit of data.
    Answer: Bit

  10. A small, super-fast type of memory that stores frequently used data and instructions to help the computer run faster.
    Answer: Cache Memory

  11. The hardware components used to store, retrieve and manage data.
    Answer: Storage Devices

  12. The storage devices that use lasers to read and write information.
    Answer: Optical Discs

  13. A small, portable flash storage device used to store and transfer data.
    Answer: Pen Drive

  14. A way to store your files, like documents, photos and videos, on the Internet.
    Answer: Cloud Storage

Short Answer Questions

  1. What is a computer system? Write down the main units of the computer system.
    A computer system is a combination of hardware and software that works together to process data and produce meaningful information.

    Main Units of a Computer System:
    • Input Unit
    • Central Processing Unit (CPU)
    • Memory Unit
    • Output Unit
    • Storage Unit

  2. What is an input device? Write any four examples of it.
    An input device is a hardware device used to enter data and instructions into a computer.

    Examples:
    • Keyboard
    • Mouse
    • Scanner
    • Microphone

  3. Mention the functions performed by ALU.
    The ALU (Arithmetic Logic Unit) performs:
    • Arithmetic operations such as addition, subtraction, multiplication and division.
    • Logical operations such as AND, OR, NOT and comparison.

  4. Define cache memory.
    Cache memory is a small, very fast memory located close to the CPU that stores frequently used data and instructions to speed up processing.

  5. What is CPU? How does it work? Explain.
    The CPU (Central Processing Unit) is the main processing unit of a computer and is known as the brain of the computer.

    Working of CPU:
    • Receives data and instructions from memory.
    • Processes the data using the ALU.
    • Controls all computer operations through the Control Unit (CU).
    • Sends the processed results to memory or output devices.

  6. What is computer memory? Write its major classification.
    Computer memory is the storage area of a computer used to store data, instructions and information.

    Major Classifications:
    • Primary Memory
    • Secondary Memory

  7. Why is secondary memory used for future storage? Explain its types.
    Secondary memory is used for future storage because it can permanently store data even when the computer is switched off.

    Types of Secondary Memory:
    • Hard Disk Drive (HDD)
    • Solid State Drive (SSD)
    • Optical Discs (CD/DVD)
    • Pen Drive
    • Cloud Storage

  8. How does a computer mouse work? Who developed it?
    A computer mouse works by detecting movement on a surface and sending signals to the computer to move the cursor on the screen.

    The computer mouse was developed by Douglas Engelbart.

  9. Define data bus and motherboard.
    Data Bus: A set of wires or pathways that carries data between the CPU, memory and other devices.

    Motherboard: The main circuit board of a computer that connects and allows communication between all hardware components.

  10. What is cloud storage?
    Cloud storage is a method of storing data on remote Internet servers, allowing users to access their files from anywhere using an Internet connection.
  11. Differentiate between:
    1. Input Unit and Output Unit

      Input Unit Output Unit
      Hardware unit used to enter data and instructions into a computer. Hardware unit used to display processed information from a computer.
      Sends data to the computer for processing. Receives processed information from the computer.
      Examples: Keyboard, Mouse, Scanner Examples: Monitor, Printer, Speaker

    2. RAM and ROM

      RAM ROM
      Random Access Memory is a temporary memory used while the computer is running. Read Only Memory is a permanent memory that stores startup instructions.
      Data is lost when power is turned off (Volatile). Data remains even when power is turned off (Non-volatile).
      Examples: DDR4 RAM, DDR5 RAM Examples: BIOS ROM, Firmware ROM

    3. Primary Memory and Secondary Memory

      Primary Memory Secondary Memory
      Memory directly accessed by the CPU. Memory used for permanent storage of data and programs.
      Faster but has smaller storage capacity. Slower but has larger storage capacity.
      Examples: RAM, ROM, Cache Memory Examples: HDD, SSD, Pen Drive

    4. Hard Disk Drive (HDD) and Solid State Drive (SSD)

      Hard Disk Drive (HDD) Solid State Drive (SSD)
      A storage device that stores data using magnetic disks. A storage device that stores data using flash memory.
      Slower and contains moving parts. Faster and contains no moving parts.
      Examples: 1TB HDD, 500GB HDD Examples: SATA SSD, NVMe SSD

Long Answer Questions

  1. Explain the role of input devices in a computer system. Provide examples and describe their functions.

    Input devices are hardware devices used to enter data and instructions into a computer system. They act as a communication bridge between the user and the computer by converting user actions into a form that the computer can understand and process.

    Examples and Functions of Input Devices:
    • Keyboard - Used to enter text, numbers and commands into a computer.
    • Mouse - Used to point, click, drag and interact with graphical objects on the screen.
    • Scanner - Converts printed documents and images into digital form.
    • Microphone - Captures sound and converts it into digital signals.
    • Webcam - Captures images and videos for communication and recording purposes.
    Input devices are essential because they provide the data and instructions that the computer needs to perform tasks and produce meaningful output.

  2. How do input devices like keyboards and mouse differ from more advanced input devices such as touchscreens or biometric scanners?

    Traditional input devices such as keyboards and mice require physical interaction through typing or clicking. They are mainly used to enter text, numbers and commands.

    Advanced input devices such as touchscreens and biometric scanners provide more direct and intelligent methods of interaction.
    Keyboard and Mouse Touchscreen and Biometric Scanner
    Require typing or clicking. Allow direct interaction through touch or biometric data.
    Mainly used for inputting commands and text. Used for identification, authentication and touch-based control.
    Less advanced technology. More advanced and user-friendly technology.
    Examples: Keyboard, Mouse Examples: Touchscreen, Fingerprint Scanner

    Advanced input devices improve convenience, speed, security and user experience.

  3. Define the role of a processing device in a computer system. How does a CPU function as the “brain” of the computer?

    A processing device is a component that processes data and instructions to produce meaningful information. The main processing device in a computer system is the Central Processing Unit (CPU).

    The CPU is called the "brain of the computer" because it controls and coordinates all activities of the computer system.

    Functions of the CPU:
    • Performs arithmetic calculations such as addition, subtraction, multiplication and division.
    • Performs logical operations such as comparisons and decision making.
    • Controls and manages the activities of all hardware components.
    • Processes data received from input devices.
    • Produces results and sends them to output devices.
    Therefore, the CPU acts as the brain of the computer by controlling, processing and managing all operations.

  4. What are storage devices and how are they classified? Compare primary and secondary storage devices.

    Storage devices are hardware components used to store, retrieve and manage data and information in a computer system.
    Comparison of Primary and Secondary Storage:
    Primary Storage Secondary Storage
    Directly accessed by CPU. Not directly accessed by CPU.
    Faster speed. Slower speed.
    Smaller storage capacity. Larger storage capacity.
    Mostly temporary storage. Permanent storage.
    Examples: RAM, ROM, Cache. Examples: HDD, SSD, Pen Drive.

  5. What is a motherboard and why is it considered the backbone of a computer?

    The motherboard is the main circuit board of a computer that connects all hardware components and allows them to communicate with each other.

    It is considered the backbone of a computer because every major component is connected to it either directly or indirectly.

    Functions of the Motherboard:
    • Connects the CPU, memory, storage devices and other hardware components.
    • Provides communication pathways between different components.
    • Distributes power from the power supply to connected devices.
    • Provides slots and ports for expansion cards and peripheral devices.
    • Coordinates data transfer between components.
    Because all computer components rely on the motherboard for communication and connectivity, it is known as the backbone of the computer system.