All questions of Computers and IT for Class 7 Exam

Bar code ...

Answer is a

Format

Utility software is to maintenance, manage of computer.

Answer:
The computer game created by Steve Russell, Martin Graetz, and Wayne Wiitanen is SpaceWar!
Explanation:
- SpaceWar! is a space combat video game that was developed in 1962 by Steve Russell, Martin Graetz, and Wayne Wiitanen at the Massachusetts Institute of Technology (MIT).
- The game was inspired by science fiction stories and allowed players to control spaceships and engage in battles in the vacuum of space.
- SpaceWar! was one of the earliest digital computer games and was created for the PDP-1, a minicomputer developed by Digital Equipment Corporation.
- The game featured two spaceships, each controlled by a player, and the objective was to destroy the opponent's spaceship while navigating the gravitational forces of a central star.
- SpaceWar! was an influential game that paved the way for future space combat games and had a significant impact on the development of the video game industry.
- It showcased the potential of video games as a form of entertainment and demonstrated the capabilities of early computer systems.
- SpaceWar! is considered a classic and is recognized as one of the first examples of interactive entertainment software.
- It has been widely emulated and its influence can be seen in many subsequent space-themed games.
- Steve Russell, Martin Graetz, and Wayne Wiitanen are credited with creating SpaceWar! and their work has left a lasting legacy in the history of computer gaming.

Double click refers to the action of quickly clicking the left mouse button twice. Each click is a brief press and release of the button. This action is commonly used in computer applications, operating systems, and web browsers to perform specific functions or actions.

Below is a detailed explanation of the answer:

Definition of Double Click:
Double click is a mouse operation that involves rapidly pressing the left mouse button twice in succession. It is a common way to interact with graphical user interfaces and perform various actions on a computer.

Procedure of Double Click:
To perform a double click, follow these steps:
1. Position the mouse cursor over the desired target or object on the screen.
2. Press the left mouse button down and release it quickly.
3. Repeat the action of pressing and releasing the left mouse button quickly for the second time.

Functionality of Double Click:
When a double click is executed, it often triggers specific actions or functions depending on the context in which it is used. Some common examples include:
- Opening files or folders: In many operating systems, a double click on a file or folder icon will open it, allowing the user to access its contents.
- Launching applications: Double clicking on the icon of an application will start the program, allowing the user to use its features and functionalities.
- Selecting text or objects: Double clicking on a word or an object in certain applications allows the user to select it for editing or manipulation.
- Zooming in or out: In web browsers or image editing software, double clicking can often be used to zoom in or out on a webpage or an image.

Advantages of Double Click:
- Speed and efficiency: Double clicking allows users to perform actions quickly without the need for additional clicks or keyboard commands.
- Ease of use: Double clicking is a commonly understood and intuitive operation, making it accessible to users of all levels of computer proficiency.

In conclusion, double click refers to the quick succession of two left mouse button clicks, which triggers specific functions or actions in computer applications. It is a widely used interaction technique that enhances efficiency and ease of use in graphical user interfaces.

Semi colon is the answer

An is the answer ....

Answer ( C ) Optical Character Recognition

Microphone captures audio by converting sound waves into an electronic signal.

Compare

Supercomputer Developed in India:
There are two supercomputers that have been developed in India:
1. Param:
- Param is a series of supercomputers developed by the Centre for Development of Advanced Computing (C-DAC) in India.
- It is designed to meet the computational needs of scientific and engineering applications.
- Param supercomputers have been used in various fields such as weather forecasting, climate modeling, computational biology, and aerospace research.
2. Anurag:
- Anurag is another supercomputer developed in India.
- It was developed by the Indian Institute of Tropical Meteorology (IITM) in Pune.
- Anurag is used for weather and climate research, including numerical weather prediction, climate modeling, and monsoon studies.
Conclusion:
The correct answer to the question is option D: Both (a) and (b). Both Param and Anurag are supercomputers developed in India.

The ability to put separate images together in order to form one 3-D image is known as stereopsis, or binocular depth perception. Stereopsis is the brain's ability to use information from both eyes to create a single 3-D image of the environment. It allows us to perceive depth and distance, and is important for activities such as navigating our surroundings and judging the size and distance of objects. Stereopsis is based on the difference in perspective between the two eyes, which allows the brain to calculate the relative distance of objects in the environment.

Answer:

The correct answer is option 'C' - Four.

Explanation:

A numeric web address is called an IP address, which is a unique identifier for devices connected to a network. An IP address is made up of a series of numbers separated by dots. Each number in the IP address is known as an octet, and it can range from 0 to 255.

The format of an IP address is as follows: xxx.xxx.xxx.xxx

Each "xxx" represents an octet, and there are four octets in total. The numbers in the octets can range from 0 to 255, giving a total of 256 possible values for each octet.

Here are some examples of IP addresses:

- 192.168.0.1
- 10.0.0.2
- 172.16.0.10

In each of these examples, there are four numbers separated by dots. Therefore, a numeric web address contains four numbers separated by dots.

Summary:

- A numeric web address, also known as an IP address, is made up of a series of numbers separated by dots.
- Each number in the IP address is called an octet and can range from 0 to 255.
- The format of an IP address is xxx.xxx.xxx.xxx, where each "xxx" represents an octet.
- Therefore, a numeric web address contains four numbers separated by dots.

Answer:

GoldenEye 007 was the hugely popular Nintendo 64 game that was rumored to have a secret location accessible in its very first level. This first-person shooter game, released in 1997, was developed by Rare and published by Nintendo.

The Rumor:
The rumor about the secret location in GoldenEye 007 spread among gamers during the late 90s. According to the rumor, there was a hidden room accessible in the Facility level, which is the first level of the game.

Searching for the Secret:
Players started to explore every nook and cranny of the Facility level in an attempt to discover the secret location. They tried different strategies, searched for hidden passages, and experimented with various actions in the game to find the entrance to the rumored hidden room.

The Truth:
After numerous attempts, gamers finally discovered that the rumor was indeed true. There was a secret room in the Facility level, accessible through a hidden passage. To enter the secret room, players had to destroy a certain wall panel, which would reveal the entrance.

What's Inside:
Inside the secret room, players found a variety of weapons and ammunition, making it a valuable discovery. The room was small and contained a stash of useful items that could aid players in their missions throughout the game.

The Impact:
The rumor of the secret room in GoldenEye 007 added to the game's popularity and replay value. It increased the excitement and curiosity among players, encouraging them to search for hidden secrets in other levels as well. This discovery also showcased the attention to detail and hidden surprises that game developers incorporated into their creations.

Overall, the secret location in the first level of GoldenEye 007 was a fascinating addition to an already highly regarded game. It sparked the imagination of players and provided an additional challenge to those seeking to uncover all the secrets the game had to offer.

Its Answer is d because option a, b, c are some sites while option d is not a site and it doesn't means anything

To identify the protocol name in the given URL "http://www.unifiedcouncil.com", we need to understand the structure of a URL. A URL consists of several parts, including the protocol, domain name, and path.
Parts of the URL:
1. Protocol: The protocol specifies the method or protocol used to access the resource on the internet. It is the first part of a URL and is followed by a colon (:) and two forward slashes (//). In this case, the protocol name is "http".
2. Domain Name: The domain name is the unique name that identifies a website on the internet. It usually consists of two parts - the second-level domain (e.g., "unifiedcouncil") and the top-level domain (e.g., "com"). In this case, the domain name is "www.unifiedcouncil.com".
Identifying the Protocol Name:
In the given URL "http://www.unifiedcouncil.com", the protocol name can be identified by looking at the first part of the URL.
- Option A: .com - Incorrect. This represents the top-level domain, not the protocol name.
- Option B: .www - Incorrect. This is not a valid part of the URL and does not represent the protocol name.
- Option C: .http - Correct. This represents the protocol name "http".
- Option D: unified - Incorrect. This represents the second-level domain, not the protocol name.
Therefore, the correct answer is option C: .http.

Data Processing Functions of a Computer
The major data processing functions of a computer include gathering data, processing data into information, analyzing data or information, and storing the data or information. However, one of these functions is not considered a major data processing function. Let's analyze each function to determine which one does not fit:
A: Gathering data
- This function involves collecting raw data from various sources such as sensors, input devices, or databases.
B: Processing data into information
- This function involves manipulating and transforming raw data into meaningful information by performing calculations, sorting, filtering, and formatting.
C: Analyzing data or information
- This function involves examining the processed data or information to discover patterns, trends, relationships, or insights.
D: Storing the data or information
- This function involves saving the processed data or information in a storage medium, such as a hard drive, solid-state drive, or cloud storage.
Answer: C. Analyzing data or information
Explanation: Analyzing data or information is not considered a major data processing function of a computer. While analyzing data is an important task, it is typically performed by humans or specialized software programs rather than being a core function of the computer itself. The computer's primary role is to efficiently gather, process, and store data, enabling humans or software programs to analyze the information later.

Understanding Hyperlinks in MS Excel
In MS Excel, hyperlinks are versatile elements that can enhance the functionality of your spreadsheets. They can be applied to various objects, making them a powerful tool for navigation and referencing.
Types of Hyperlinks
- Special Shapes: Hyperlinks can be embedded in special shapes like stars, banners, and other custom shapes. This allows users to create visually appealing navigation options within the spreadsheet.
- Drawing Objects: Users can also assign hyperlinks to drawing objects such as rectangles, ovals, and other geometric figures. This feature is useful for creating buttons or interactive elements that lead to different sections or external resources.
- Text and Pictures: Hyperlinks can easily be attached to text and images. This is commonly used to link to websites or other documents, allowing for quick access to relevant information.
Conclusion
Since hyperlinks can be applied to all these elements—special shapes, drawing objects, text, and pictures—it is accurate to say that hyperlinks in MS Excel can be of various types. This flexibility not only enhances the user experience but also aids in effective data presentation and navigation.
Utilizing hyperlinks in these different formats can significantly improve the interactivity and functionality of your Excel spreadsheets.

Understanding Search Engines
Search engines are powerful tools that help users find information on the internet. They index websites and present relevant results based on user queries. Let's explore the options provided:
G-mail
- G-mail is primarily an email service provided by Google.
- Its main function is to send, receive, and manage emails.
- It does not index web pages or provide search functionality for internet content.
Yahoo
- Yahoo is one of the earliest search engines, still functioning as a popular web portal.
- It allows users to search for information across the internet.
AltaVista
- AltaVista was a search engine known for its fast and comprehensive search capabilities.
- It played a significant role in the development of internet search technology before being discontinued.
Google
- Google is the most widely used search engine today.
- It provides users with quick access to a vast database of information on the web.
Conclusion
In summary, the correct answer to the question is option 'A' (G-mail) because it does not function as a search engine. Instead, it serves as an email platform, unlike Yahoo, AltaVista, and Google, which are designed specifically for searching the internet. This distinction is crucial for understanding the various services available online.

The correct option is B, I, II & III are correct.
(i) Supercomputers are used for weather forecasting. This is true. Supercomputers are extremely powerful machines that can process large amounts of data quickly, making them well suited for complex simulations such as weather forecasting.
(ii) Supercomputers are used for rocketing and plasma physics. This is true. Supercomputers are used for simulating the behavior of rocket engines and the behavior of plasma in various applications.
(iii) Processing speed of microcomputer lies in the range of 10-30 MIPS. This is true. Microcomputers generally have lower processing speeds than supercomputers and mainframe computers, typically in the range of 10-30 million instructions per second (MIPS).
(iv) Mainframe computers are less powerful than the minicomputers. This statement is not true. Mainframe computers are more powerful than minicomputers, They are used for large-scale data processing and are typically found in large organizations such as government agencies, banks, and insurance companies.
Therefore, statement I, II & III are correct.

Understanding Blogging
Blogging refers to the process of creating and managing a blog, which is an online platform for sharing information, thoughts, and experiences. This involves several activities, including authoring, maintaining, adding, and updating articles.
Key Activities in Blogging:
- Authoring: This is the act of writing new posts or articles for the blog. It requires creativity and knowledge on the topic being discussed.
- Maintaining: This involves keeping the blog updated with fresh content and ensuring that all links and features are functioning properly.
- Adding: Bloggers often add new categories or topics to expand the scope of their blog, attracting a wider audience.
- Updating: Regular updates are crucial for keeping the content relevant and engaging. This includes revising old posts to reflect new information or trends.
Why 'Blogging' is the Correct Answer:
The term "blogging" encompasses all of these activities. It is not limited to writing alone but includes the overall management of the blog. While "weblog" refers to the blog itself, and "links" and "forum" describe different online concepts, "blogging" captures the essence of the entire process involved in maintaining a blog.
Conclusion:
In conclusion, option 'B', "Blogging," is the correct choice because it accurately describes the comprehensive actions of creating, managing, and updating content on a blog. Understanding these elements is essential for anyone looking to engage in this dynamic form of online communication.

False Statement: D: Mainframe computers are larger than supercomputers.
Explanation:
- A mainframe computer is a large and powerful computer that is used for large-scale computing tasks.
- A supercomputer is a computer that is at the forefront of current processing capacity, particularly speed of calculation.
- Mainframe computers and supercomputers are both large and powerful, but they serve different purposes and have different characteristics.
- Supercomputers are designed for highly complex and demanding computational tasks, while mainframe computers are typically used for general-purpose business applications.
- In terms of physical size, mainframe computers are generally larger than supercomputers.
- Supercomputers are often built using a large number of smaller processors, which allows for parallel processing and high-speed calculations.
- Mainframe computers, on the other hand, are often built using a smaller number of more powerful processors.
- Therefore, the statement that mainframe computers are larger than supercomputers is false.
In summary, the false statement is that mainframe computers are larger than supercomputers.

The correct answer is C: HP Envy x2 Hybrid PC.
The HP Envy x2 Hybrid PC is an 11.6-inch Windows 8 notebook with a lid that pops off to become a standalone tablet. Here are the reasons why this is the correct answer:
- Size: The HP Envy x2 is specifically mentioned as an 11.6-inch notebook, which matches the given description.
- Operating System: It runs on Windows 8, as stated in the question.
- Convertible Design: The key feature of the HP Envy x2 is its hybrid design, where the lid can be detached to transform it into a standalone tablet. This matches the description of the notebook with a lid that pops off.
- Brand: The question does not specifically mention the brand, but the options provided include different HP models. Since the correct answer is an HP notebook, the HP Envy x2 Hybrid PC is the only option that matches.
To summarize, the HP Envy x2 Hybrid PC is the correct answer because it is an 11.6-inch Windows 8 notebook with a detachable lid that allows it to function as a standalone tablet.

• Inbox: The inbox is the folder where received emails are stored. It does not pertain to sending identical messages to multiple people.


• Draft: The draft folder is used to save unfinished or unsent emails. It is not related to sending identical messages to multiple people.


• Spam: The spam folder is where unsolicited and potentially harmful emails are filtered. It may also contain promotional messages or advertisements that have been marked as spam by the recipient. This is the correct answer as it relates to sending identical messages to many people, especially advertisements.


• Chat: The chat feature in an email client allows for real-time messaging between users. It is not specifically designed for sending identical messages to multiple people.

Therefore, the correct answer is C: Spam. This feature of an email includes messages that are sent to many people, particularly advertisements that may be marked as spam by the recipient.

The computer language you are referring to is binary. Binary is a base-2 number system that uses only two digits, 0 and 1, to represent all information in a computer. Each 0 or 1 is called a "bit" (binary digit), and a combination of bits represents different instructions and data in a computer program.

Explanation:
The correct answer is C: Virus.
- A virus is a program that can interrupt the normal operation of a computer.
- It is a type of malicious software that can replicate itself and spread from one computer to another.
- Viruses can cause various types of disruptions, including slowing down the computer, corrupting files, and stealing sensitive information.
- Common sources of viruses include downloading infected files from the internet, opening malicious email attachments, or visiting compromised websites.
- Once a virus infects a computer, it can execute its intended actions, which may include damaging or disabling the system, deleting files, or stealing personal information.
- To protect against viruses, it is important to have up-to-date antivirus software installed on the computer and to practice safe browsing habits.
- Antivirus software can detect and remove viruses from the system, as well as prevent future infections.
In summary, a virus is a program that can disrupt the normal operation of a computer and cause various types of damage. It is important to have antivirus software and practice safe browsing habits to protect against viruses.

Understanding the Concept of a Browser
A browser is a crucial tool that enables users to access a wide range of internet resources. Let’s explore what a browser is and why it is the correct answer to the question.
What is a Browser?
- A browser is a software application designed specifically for retrieving, presenting, and navigating information on the internet.
- Popular examples include Google Chrome, Mozilla Firefox, Safari, and Microsoft Edge.
Key Functions of a Browser
- Accessing Websites: Browsers allow users to enter website addresses (URLs) and access web pages.
- Displaying Content: They render HTML, CSS, and JavaScript to display text, images, videos, and other multimedia content.
- Navigation: Browsers provide features like back and forward buttons, bookmarks, and tabs to make it easier to browse multiple pages.
Distinction from Other Options
- Address: This refers to the URL or web address where resources are located but does not perform any functions itself.
- Provider: This typically refers to an Internet Service Provider (ISP) that connects users to the internet but does not provide access to resources directly.
- Protocol: Protocols like HTTP or HTTPS are rules for data transfer over the web but do not interact with users directly.
Conclusion
In summary, the correct answer to the question is option 'B' - Browser. It is the program that acts as the gateway to the vast resources of the internet, allowing users to view and interact with content seamlessly.

Reviewing Modifications in MS Word
To review the modifications made to an existing letter in MS Word before printing, you should use the "Track Changes" feature. Here's how it works:
1. Enable Track Changes:
- Open the document in MS Word.
- Go to the "Review" tab in the ribbon at the top.
- Click on the "Track Changes" button to enable tracking.
2. View and Review Modifications:
- Once track changes are enabled, any edits or modifications made to the document will be highlighted.
- Inserted text will appear underlined and in a different color, while deleted text will appear struck through or in a different color.
- You can navigate through the changes using the navigation buttons provided in the "Changes" group on the "Review" tab.
- Review each modification to ensure it meets your requirements.
3. Accept or Reject Changes:
- After reviewing the modifications, you can choose to accept or reject each change individually or collectively.
- Right-click on a specific change and select "Accept" or "Reject" to make a decision.
- Use the "Accept" or "Reject" buttons in the "Changes" group to apply the decision to all changes at once.
4. Finalize the Document:
- Once you have reviewed and made any necessary changes, you can finalize the document by accepting or rejecting all remaining changes.
- You can also turn off the "Track Changes" feature if you no longer need it.
By utilizing the "Track Changes" feature in MS Word, you can easily review the modifications made to a document, ensuring its accuracy before printing.

Characters in an email address:
- An email address is a unique identifier that allows individuals to send and receive emails.
- It consists of two main parts: the username and the domain name.
- The username is the part before the "@" symbol, and the domain name is the part after the "@" symbol.
- The username can contain various characters, including letters, numbers, and certain special characters such as dot, underscore, and dash.
- However, the domain name always contains a dot (".") character, which separates the domain name into different sections.
- The domain name typically consists of the domain name itself (e.g., gmail, yahoo) and the top-level domain (e.g., .com, .org, .net).
- The dot character is essential to separate these sections and ensure that the email is sent to the correct domain.
- The "@" symbol is used to separate the username and the domain name, indicating that the email is intended for a specific user at a specific domain.
Answer:
The correct answer is B: @ and dot.

Introduction:
To perform what-if analysis, which involves exploring different scenarios and their potential outcomes, several tools can be used. These tools help in analyzing the impact of changing variables on the final results. The question asks which of the following tools should be used for this purpose.

Explanation:
The correct answer is option 'D' - All of these. Let's understand why:

Data Table:
- A data table is a powerful tool in Microsoft Excel that allows users to analyze the impact of changing inputs or variables on the final output.
- It enables users to create multiple scenarios by changing one or more input values and observing the corresponding changes in the calculated results.
- By using a data table, you can easily compare and contrast the outcomes of different scenarios, making it an essential tool for what-if analysis.

Goal Seek:
- Goal Seek is another tool in Excel that helps users find the input value needed to achieve a specific goal or desired result.
- It allows users to set a target value for a formula and then automatically determines the input value required to achieve that target.
- Goal Seek is particularly useful when you want to determine the necessary changes in input variables to achieve a desired outcome.
- This tool is commonly used in what-if analysis to identify the precise values needed to reach a specific objective.

Scenario Manager:
- Scenario Manager is a built-in tool in Excel that enables users to create and manage multiple scenarios based on different sets of input values.
- It allows users to define and save various scenarios, each with its own specific input values.
- By creating multiple scenarios, users can compare and analyze the outcomes of different situations and make informed decisions.
- Scenario Manager is widely used in what-if analysis to explore the effects of various combinations of input variables on the final results.

Conclusion:
In conclusion, all of the mentioned tools (Data Table, Goal Seek, and Scenario Manager) are useful for performing what-if analysis. Each tool offers unique features and capabilities that aid in analyzing the impact of changing variables on the final outcomes.

Explanation:
The email address "shraddha@del2.vsnl.net.in" consists of several parts separated by the "@" symbol. The part after the "@" symbol, "del2.vsnl.net.in", refers to the domain or server of the email address.
Domain Components:
- del2: This component refers to the specific server within the vsnl.net.in domain. It is a subdomain or subserver.
- vsnl: This component refers to the main domain or organization. VSNL stands for Videsh Sanchar Nigam Limited, which is an Indian government-owned telecommunications company.
- net.in: This component represents the top-level domain for network infrastructure in India.
Conclusion:
Based on the information provided, the "del2" in the email address "shraddha@del2.vsnl.net.in" refers to the specific server or subdomain within the vsnl.net.in domain. Therefore, the correct answer is B: Server.

Address Book is the correct answer.

Explanation:
An address book is a digital or physical record where individuals can store contact information of people they are in regular touch with. It serves as a centralized location to store and organize email addresses, phone numbers, and other relevant details of friends, family, colleagues, and acquaintances.

Here is a detailed explanation of why an address book is the most appropriate option for saving the email addresses of friends who are in regular touch:

1. Purpose of an Address Book:
- An address book is specifically designed to store contact information.
- It allows individuals to quickly access and retrieve the email addresses and other details of their contacts.

2. Contact Management:
- An address book provides a systematic way of managing contacts.
- It allows users to categorize contacts into different groups, such as friends, family, work, etc.
- This categorization enables easy searching and filtering of contacts.

3. Digital Address Books:
- With the advancement of technology, digital address books have become popular.
- Digital address books can be in the form of applications or software on computers, smartphones, or online platforms.
- These digital address books provide convenient features like search functionality, backup options, and synchronization across devices.

4. Accessibility and Convenience:
- Storing email addresses in an address book ensures easy accessibility whenever required.
- It eliminates the need to remember or search for email addresses in various places.
- Address books are often integrated with email clients, making it effortless to compose emails by simply selecting the desired contact.

5. Additional Information:
- Apart from email addresses, address books can also store other relevant information about contacts, such as phone numbers, home addresses, birthdays, and notes.
- This comprehensive information makes it easier to maintain a complete record of contacts.

In conclusion, an address book is the most suitable option for saving the email addresses of friends who are in regular touch. It provides a centralized and organized way of managing contact information, ensuring easy accessibility and efficient communication.

Understanding Kerning
Kerning is a typographic feature that enhances the visual appeal of text by adjusting the spacing between specific character pairs. It plays a crucial role in ensuring that words appear balanced and aesthetically pleasing.
What is Kerning?
- Kerning refers to the adjustment of space between two particular characters.
- It aims to create a uniform look and feel in typography, especially in fonts like Times New Roman.
Importance of Kerning
- Improves Readability: Proper kerning makes words easier to read by preventing awkward spacing that can confuse readers.
- Enhances Aesthetics: Adjusted spacing contributes to a more polished and professional appearance of the text.
- Context Sensitivity: Different character pairs may require different spacing adjustments. For example, "AV" might need more space than "AY."
How Kerning Works
- Software applications often include kerning settings that automatically calculate and adjust spacing based on predefined rules.
- Designers can manually adjust kerning to achieve a specific look or feel for their text.
Comparison with Other Terms
- Spacing: Refers to the overall distance between characters but does not focus on specific pairs.
- Scaling: Involves resizing characters but does not affect spacing.
- Positioning: Deals with the placement of characters relative to one another rather than the space between them.
In summary, kerning is an essential aspect of typography that enhances the readability and visual appeal of text by adjusting the space between specific character pairs, making it the correct answer to the question.

• .net: The correct answer is B. The domain name ".net" is commonly used for networking organization websites. It is short for "network" and is often associated with internet service providers, technology companies, and organizations involved in networking and communications.


• .int: The domain name ".int" is used for websites of international organizations established by treaty, such as the United Nations and its specialized agencies.


• .com: The domain name ".com" is a generic top-level domain (gTLD) that is widely used for commercial websites. It is not specific to networking organizations.


• .org: The domain name ".org" is a gTLD that is commonly used for non-profit organizations, charities, and other non-commercial entities. While some networking organizations may use this domain, it is not exclusively for them.

Therefore, the correct domain name for a networking organization website is ".net".

The correct answer is option 'C' - Corrections.

Explanation:
The Corrections command is used to adjust the brightness and contrast of an image. This command is commonly found in image editing software and allows users to enhance the visual appearance of an image by making it brighter or darker and adjusting the contrast.

Adjusting the brightness and contrast of an image can greatly impact its overall appearance. Here's how the Corrections command works:

1. Open the image: Start by opening the image you want to adjust in an image editing software such as Adobe Photoshop or Microsoft Paint.

2. Locate the Corrections command: Once the image is open, navigate to the menu or toolbar where the image editing options are located. Look for a tab or button that is labeled "Corrections" or "Adjustments." This is where the brightness and contrast adjustment options can be found.

3. Adjust brightness: Within the Corrections command, there will be a slider or numerical input that allows you to increase or decrease the brightness of the image. Moving the slider to the right will make the image brighter, while moving it to the left will make it darker. You can also manually enter a numerical value to adjust the brightness.

4. Adjust contrast: Similarly, the Corrections command will also provide options for adjusting the contrast of the image. Contrast refers to the difference between the light and dark areas of an image. Increasing the contrast will make the bright areas brighter and the dark areas darker, while decreasing the contrast will make the image appear more flat or washed out.

5. Preview and apply the adjustments: As you make changes to the brightness and contrast settings, the image will update in real-time to reflect these adjustments. You can preview the changes before applying them to ensure the desired result. Once you are satisfied with the adjustments, apply them to the image.

By using the Corrections command, you can easily adjust the brightness and contrast of an image to enhance its visual appeal. This can be particularly useful when working with photographs or images that are too dark or lack proper contrast.

Data that can be sent via email:

• Audio: You can send audio files as attachments in an email. This can include music files, voice recordings, podcasts, etc.


• Video: Videos can also be sent via email as attachments. These can be personal videos, movies, short films, or any other type of video file.


• Pictures: Images or photographs can be easily attached and sent via email. This can include personal photos, professional images, or any visual content.


• Documents: Various types of documents can be sent via email, such as Word documents, PDFs, spreadsheets, presentations, etc.


• Archives: Compressed or archived files, such as ZIP or RAR files, can be sent via email. These files can contain multiple files or folders.


• Text: Plain text or formatted text can be sent via email. This includes emails containing messages, letters, articles, or any other written content.


• Links: Email can also be used to share links to websites, online resources, cloud storage, or any other web-based content.


• Contacts: You can send contact information in the form of vCards or contact files via email.


• Calendars: Calendar events or appointments can be shared via email. These can be in the form of calendar invites or attachments.

Note: When sending large files, it is important to consider the file size limitations of email providers and the recipient's email server. It may be necessary to compress large files or use file-sharing services to send them.

Device used to scan input and convert it into a computer file:
There are several devices that can be used to scan input and convert it into a computer file. However, the most commonly used device for this purpose is a scanner.
Scanner:
- A scanner is a device that optically scans images, printed text, or objects and converts them into a digital format that can be saved and manipulated on a computer.
- It works by shining a light onto the image or document and then capturing the reflected light with a sensor.
- The sensor converts the light into electrical signals, which are then translated into binary code and saved as a computer file.
- Scanners are commonly used to digitize documents, such as photos, contracts, and printed text, making them easier to store, share, and manipulate on a computer.
Other options:
- Keyboard: The keyboard is primarily used for inputting text and commands into a computer. It does not have the capability to scan and convert physical documents into digital files.
- Mouse: The mouse is an input device used to control the cursor on a computer screen. It does not have the capability to scan and convert physical documents into digital files.
- Microphone: The microphone is used for recording audio input. It does not have the capability to scan and convert physical documents into digital files.
Conclusion:
The correct answer is C: Scanner. A scanner is the device used to scan input, such as images or documents, and convert them into a computer file.

A relational operator is a programming language construct or operator that tests or defines some kind of relation between two entities. These include numerical equality (e.g., 5 = 5) and inequalities (e.g., 4 ≥ 3). ... Relational operators can be seen as special cases of logical predicates.

Modem as an Input and Output Device:

Modem is a device that modulates digital signals from a computer into analog signals for transmission over telephone lines, and demodulates the analog signal back into digital signals. It is used to connect a computer to the internet or other networks.

Input Device:
- A modem is an input device because it receives data from a computer and converts it into analog signals for transmission over telephone lines.

Output Device:
- A modem is also an output device because it receives analog signals from telephone lines and converts them into digital signals for the computer to process.

Both an Input and Output Device:
- Modem is both an input and output device because it performs two-way communication between the computer and the network. It receives data from the computer and sends it to the network and receives data from the network and sends it to the computer.

Conclusion:
- In conclusion, a modem is a device that functions as both an input and output device. It receives data from a computer and converts it into analog signals for transmission over telephone lines, and receives analog signals from telephone lines and converts them into digital signals for the computer to process.

Correct answer is b

ISP stands for Internet Service Provider.

An Internet Service Provider (ISP) is a company or organization that provides internet access to individuals or businesses. ISPs connect customers to the internet through various technologies such as dial-up, DSL, cable, fiber-optic, or wireless connections. They act as the intermediary between users and the internet, enabling users to access and browse the web, send emails, download files, stream videos, and perform various online activities.

Importance of ISPs:

ISPs play a crucial role in the functioning of the internet and have become an essential part of modern life. Some key points regarding the importance of ISPs are:

1. Connecting Users to the Internet: ISPs enable individuals and businesses to connect to the internet by providing them with a reliable internet connection.

2. Providing Internet Services: ISPs offer a range of services, including internet plans with different speeds and data limits, email services, web hosting, virtual private networks (VPNs), and more.

3. Managing Network Infrastructure: ISPs are responsible for maintaining and upgrading the necessary network infrastructure to ensure a stable and fast internet connection for their customers.

4. Technical Support: ISPs provide technical support to their customers, helping them troubleshoot internet-related issues and assisting with the setup of routers, modems, and other network equipment.

5. Data Management and Security: ISPs are responsible for managing user data and ensuring the security and privacy of their customers' online activities.

6. Internet Governance: ISPs also play a role in internet governance, adhering to regulations and policies set by regulatory bodies and governments.

Types of ISPs:

There are different types of ISPs, including:

1. Large National or Regional ISPs: These ISPs have a wide coverage area and offer internet services to a large number of customers. They often provide a variety of plans and services to cater to different needs.

2. Local ISPs: Local ISPs operate in specific regions or communities and provide internet services to a smaller customer base. They may focus on offering personalized services or catering to niche markets.

3. Wireless ISPs (WISPs): WISPs use wireless technologies to provide internet access to customers in areas where wired connections may not be available or viable.

4. Internet Exchange Points (IXPs): IXPs are not traditional ISPs but serve as meeting points where different ISPs connect their networks to exchange internet traffic.

In conclusion, an ISP is an Internet Service Provider that connects individuals and businesses to the internet, provides various internet services, manages the network infrastructure, and ensures the security and privacy of users' online activities. They are crucial for accessing and utilizing the internet in today's digital age.

To set up an email address, one can choose from various websites that provide email services. Among the given options, the following site allows users to set up an email address:
Option C: www.hotmail.com
Here is a detailed explanation of each option:
Option A: www.google.com
- Google is a popular search engine and technology company.
- While Google offers various services, such as Gmail for email, it does not allow users to set up an email address directly from the Google homepage. To create a Gmail account, one can visit the Gmail website or use the Google account creation process.
Option B: www.gov.nic.in
- The website www.gov.nic.in is the official website of the Indian government's National Informatics Centre (NIC).
- NIC provides various services to the government and citizens of India, including email services for government officials.
- However, setting up an email address on this website is limited to government officials and is not available for the general public.
Option C: www.hotmail.com
- Hotmail, now known as Outlook.com, is a free email service provided by Microsoft.
- Users can sign up for a Hotmail/Outlook.com email address by visiting the website and following the account creation process.
- Hotmail/Outlook.com offers various features and functionalities, including email storage, calendar, contacts, and more.
Option D: www.isro.com
- The website www.isro.com is not an official website of the Indian Space Research Organisation (ISRO).
- ISRO's official website is www.isro.gov.in, which provides information about the organization's activities, missions, and achievements.
- However, ISRO does not provide email services to the public.
Therefore, the correct answer is Option C: www.hotmail.com, where users can set up an email address.

Preventing Virus Infection on Your Computer

To prevent viruses from infecting your computer, there are several important steps you can take. These steps include equipping your PC with a licensed antivirus program, scanning external storage devices before copying data from them, and avoiding the installation of pirated software from unknown sources.

1. Equip your PC with a licensed antivirus program
Having a licensed antivirus program installed on your computer is essential for protecting it against viruses. Antivirus software is specifically designed to detect, prevent, and remove malicious software, including viruses, from your computer. It regularly scans your system for potential threats and provides real-time protection to keep your computer safe.

2. Scan flash drives and floppy disks before copying data from them
Flash drives and floppy disks can be carriers of viruses and other malware. Before copying any data from these external storage devices to your computer, it is crucial to scan them with your antivirus software. This helps to ensure that the data you are transferring is free from any potential threats that may harm your computer.

3. Avoid installing pirated software from unknown sources
Pirated software refers to unauthorized copies of software that are distributed illegally. Such software often contains hidden malware or viruses that can infect your computer when installed. To prevent virus infections, it is essential to avoid installing pirated software from unknown sources or unreliable websites. Stick to reputable sources for software downloads, such as official websites or trusted app stores.

Conclusion
To protect your computer from virus infections, it is vital to equip it with a licensed antivirus program, scan external storage devices before transferring data, and avoid installing pirated software from unknown sources. These proactive steps will significantly reduce the risk of viruses infecting your computer and help ensure its overall security and performance.

T24:- T*24=T24
A is valid
M2:- M*2=M2
2B43:- it isn't valid
if it would be 243B/B243 it would be valid.