ASTRAGEN GRADE 6 NOTES

Chapter 1: Computer and Peripherals 

1. What are the different types of computers based on their performance and capacity?

Computers are classified as microcomputers, minicomputers, mainframe computers, and supercomputers.
They differ in speed, size, storage, and how many users they support.
Supercomputers are the fastest; microcomputers are for personal use.

2. What is the basic difference between LED and LCD monitors? Which gives a better output?

LCD stands for Liquid Crystal Display, and LED stands for Light Emitting Diode.
LCD uses fluorescent lights, while LED uses diodes.
LED gives better output in terms of brightness and picture quality.

3. What is the difference between impact and non-impact printers?

Impact printers strike the paper using a ribbon (like a typewriter).
Non-impact printers spray ink or use heat without touching the paper.
Non-impact printers are quieter and give better-quality prints.

4. What are the ranges of external hard disks and pen drives in terms of storage space?

External hard disks range from 500 GB (Gigabytes) to several TB (Terabytes).
Pen drives usually range from 8 GB to 1 TB.
They are used to store and transfer data.

5. What is the difference between a laptop and a notebook?

Laptops are slightly bigger and may have more features like DVD drives or ports.
Notebooks are slimmer, lighter, and used for basic tasks.
Both are portable personal computers.

6. Write short notes about the following:

  • Analog Computer:
    Works with physical data like speed, temperature, voltage, etc.
    Gives continuous output.
    Used in engineering and scientific applications.

  • Digital Computer:
    Works using binary numbers (0s and 1s).
    Most common type of computer today.
    Used in schools, homes, and offices.

  • Hybrid Computer:
    Combines both analog and digital features.
    Used in medical and industrial applications.
    Gives both fast and accurate results.

  • Supercomputer:
    A very fast and powerful computer used for complex tasks.
    Used in weather forecasting, space research, etc.
    Example: PARAM, Fugaku.

  • Mainframe Computer:
    A large computer used by big organizations like banks.
    Handles large data and many users at the same time.
    Reliable and secure.

  • Minicomputer:
    Smaller than a mainframe but supports multiple users.
    Used by small businesses and organizations.
    Less costly and powerful than mainframes.

  • Microcomputer:
    Also known as PC (Personal Computer).
    Meant for single users for tasks like typing, browsing, and games.
    Used at home, schools, and offices.

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