In this article we provide information regarding latest Class 9 Computer Notes for July Month – Navodaya TGT Computer Science (CS) 2024-25.
Class 9 Computer Notes for July Month – Navodaya TGT CS
We are using source for Syllabus – Navodaya Vidyalaya Samiti Perspective Academic Planning Split of Syllabus 2024-25.
We are giving to the Point Notes for the Students.
Thanks Me Later
For the July Month Notes – Class 9 Computer Subject
Unites we covered in Notes
- Unit 1 : Basic of Information Technology Continued
- Input Output Devices
- Types of Software
- Computer Networking
- Multimedia
Hardware and Software
- Hardware is the tangible components of the computer system which can be used to give input, store data and showing results.
- The popular hardware are mouse, keyboard, monitor, printer, processor, motherboard, cables etc.
- Software is a program or set of instructions used to do a specific task.
- The software cannot be seen by users. Users can realize and validate their functions only.
- All the software run on the hardware.
Input /Output Devices
I/O devices are the pieces of hardware used by a human (or other system) to communicate with a computer.
Keyboard
- It is the most commonly used input device.
- It is used to enter data and instructions directly into the computer.
- There are 104 buttons on the keyboard which are called keys.
Mouse
- It is another input device which is commonly found connected with the computers.
- It is basically a pointing device which works on the principle of Point and Click.
- When the mouse is moved on the mouse pad, a light beam underneath reflect to give motion to the pointer on the screen.
Scanner
We can store pictures, photographs, diagrams into the computer with the help of scanner. The scanner reads the image and saves it in the computer as a file.
Monitor
- This is the most common output device connected with the computer to display the processed information.
- It looks like a TV and is also know as VDU (Visual Display Unit)
- Pictures are displayed by using a large number of very small dots on screen called pixels.
- The number of pixels that a monitor can show on its screen is referred to as the resolution of the screen.
Printer
- This is an important output device of the computer system.
- It gives a printed output of the results that appears on the monitor screen.
- Printed output is also called Hard Copy output because unlike monitor, this output can be preserved even if the computer is switched off.
Plotter
- We can get the print of a photograph, drawing, image stored in the computer by using a plotter.
- It is an output device which provides a high quality of printed output. It is generally used by engineers and architects.
Types of Software
- System software is a software that provides platform to other software.
- System software includes the programs that are dedicated to managing the computer itself, such as the operating system, file management utilities, and disk operating system(or DOS)
- Some examples can be operating system, antivirus software, disk formatting software, computer language translators etc.
Operating System
- An operating system is a type of system software that manages computer’s hardware and software resources.
- It provides common services for computer programs. An OS acts a link between the software and the hardware.
Application Software
- These are designed to perform a specific task or a bunch of tasks.
- They can be user-designed (specific to the user’s needs) or readymade application software.
- Example : PowerPoint, Tally etc.
Computer Networking
A computer network is a system in which multiple computers are connected to each other to share information and resources.
Characteristics of Computer Network
- Share resources from one computer to another.
- Create files and store them in one computer, access those files from the other computer connected over the network.
- Connect a printer, scanner, or a fax machine to one computer within the network.
Types of Network
- LAN – Local Area Network
- PAN – Personal Area Network
- MAN – Metropolitan Area Network
- WAN – Wide Area Network
LAN (Local Area Network)
- Local Area Network is a group of computers connected to each other in a small area such as building, office.
- LAN is used for connecting two or more personal computers through a communication medium such as twisted pair, coaxial cable etc.
- It is less costly as it is built with inexpensive hardware such as hubs, new adapters, and ethernet cables.
- The data is transferred at an extremely faster rate in Local Area Network. Local Area Network provides higher security.
PAN – Personal Area Network
- Personal Area Network is a network arranged within an individual person, typically within a range of 10 meters.
- Personal Area Network is used for connecting the computer devices of personal use is known as Personal Area Network.
MAN – Metropolitan Area Network
- A Metropolitan area network is a network that covers a larger geographic area by interconnecting a different LAN to form a larger network.
- Government agencies use MAN to connect to the citizens and private industries.
- In MAN , various LANs are connected to each other through a telephone exchange line.
- It has a higher range than Local Area Network (LAN)
WAN – Wide Area Network
- A Wide Area Network is a network that extends over a large geographical area such as states of countries.
- A Wide Area Network is quite bigger network than the LAN.
- A Wide Area Network is not limited to a single location, but it spans over a large geographical area through a telephone line, fibre optic cable or satellite links.
- The Internet is one of the biggest WAN in the world.
- The Wide Area Network is widely used in the field of Business, Government, and Education.
Wireless Communication Technology
Wireless Communication Technology is categorized into different types depending on the distance of communication, the range of data and types of devices used. The following are the different types of wireless communication technologies.
Wi-Fi (Wireless Fidelity)
- It is low-cost wireless communication technology.
- A Wi-Fi setup consists of a wireless router which serves a communication hub, linking portable device with the internet connection.
Bluetooth Technology
- It allows you to connect a variety of different electronic devices wirelessly to a system for the transfer and sharing of data and this is the main function of Bluetooth.
- Cell phones are connected to hands-free earpieces, wireless keyboard, mouse and mike to laptops with the help of Bluetooth as it transmits information from one device to other device.
- Bluetooth technology has many functions, and it is used most commonly in wireless communication’s market
Cloud Computing
Cloud computing is the delivery of on-demand computing services from application to storage and processing power typically over the internet and on a pay as you go basis.
Multimedia
Multimedia means that computer information can be represented Or Computer Controlled integration of Text, Graphics, Drawings, Still and Moving images (Video), animation, audio, and any other media.
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