CBSE Class 10 Information Technology
Chapter 4: Web Applications & Security
20 Important Questions & Answers
Web Applications & Security covers accessibility options, networking fundamentals, instant messaging, blogs, online transactions, and internet security. These topics are part of the CBSE Class 10 IT syllabus.
Q1. What are web applications? Give two examples.
Answer:
Web applications are software programs that run on a web browser and use the internet to provide services to users. Unlike traditional software, they do not require installation on a computer. Users can access them from any device connected to the internet. Web applications are widely used for communication, education, banking, shopping, and entertainment. They store and process information on remote servers. Examples include Gmail, which allows users to send and receive emails, and Google Docs, which enables online document creation and collaboration. Web applications are popular because they are easy to access, automatically updated, and support real-time communication and data sharing.
Q2. What are accessibility options in computers?
Answer:
Accessibility options are special features that help people with disabilities use computers more easily. These tools improve usability for individuals with visual, hearing, physical, or learning challenges. Common accessibility features include Screen Magnifier, which enlarges text and images; Narrator, which reads text aloud; On-Screen Keyboard, which allows typing without a physical keyboard; and High Contrast Mode, which improves visibility. These features help users interact with computers independently and efficiently. Accessibility options ensure equal access to digital technology and promote inclusiveness in education, workplaces, and daily life for people with different abilities and needs.
Q3. Explain the term networking.
Answer:
Networking is the process of connecting two or more computers and devices to share information, resources, and services. A network allows users to exchange files, communicate, and access shared devices such as printers and internet connections. Networks can be small, such as those in homes and schools, or large, such as corporate and global networks. The internet is the largest example of a computer network. Networking improves communication, increases efficiency, and reduces costs by allowing resource sharing. It plays an important role in modern businesses, education systems, and online services by enabling fast and reliable information exchange among users and devices.
Q4. Differentiate between LAN and WAN.
Answer:
LAN (Local Area Network) is a network that connects computers within a limited geographical area such as a school, office, or home. It provides high-speed communication and is usually owned by a single organization. WAN (Wide Area Network) connects computers over large geographical distances, such as cities, countries, or continents. The internet is the largest WAN. LAN is generally faster, less expensive, and easier to maintain compared to WAN. WAN requires communication technologies like satellites, fiber optics, and telephone lines. Both LAN and WAN are important for sharing information, but they differ mainly in their size, ownership, speed, and communication range.
Q5. What is an IP address?
Answer:
An IP (Internet Protocol) address is a unique numerical identifier assigned to every device connected to a network. It helps computers locate and communicate with each other over the internet or a local network. Just as a postal address helps deliver mail to the correct location, an IP address helps data reach the intended device. There are two main versions: IPv4 and IPv6. An example of an IPv4 address is 192.168.1.1. IP addresses are essential for internet communication because they identify the source and destination of information exchanged between devices. Without IP addresses, networking and online communication would not be possible.
Q6. What is instant messaging?
Answer:
Instant Messaging (IM) is a communication service that allows users to exchange text messages in real time over the internet. It enables quick communication between individuals or groups. Modern instant messaging applications also support voice calls, video calls, file sharing, emojis, and multimedia messages. Examples include WhatsApp, Telegram, and Google Chat. Instant messaging is widely used in education, business, and personal communication because it provides fast and convenient interaction. Users need an internet connection and an account on the messaging platform to communicate. IM reduces communication delays and helps people stay connected regardless of their geographical location.
Q7. What is a blog?
Answer:
A blog is a website or online platform where individuals or organizations regularly publish information, opinions, articles, and updates. The person who writes and manages a blog is called a blogger. Blogs can cover topics such as education, technology, travel, food, and entertainment. Readers can often comment and interact with blog posts. Blogging helps share knowledge, experiences, and ideas with a wide audience. Platforms such as Blogger and WordPress make blog creation simple and accessible. Blogs are valuable tools for communication, marketing, learning, and personal expression. They also help improve writing skills and online visibility for creators.
Q8. What are the advantages of blogging?
Answer:
Blogging offers several benefits for individuals and organizations. It allows people to share knowledge, experiences, and opinions with a global audience. Blogs help improve communication and writing skills. Businesses use blogs to promote products, build brand awareness, and connect with customers. Educational blogs provide learning resources and information to students. Blogging can also create opportunities for networking and professional growth. Readers benefit from updated content and expert insights on various topics. Additionally, blogs encourage interaction through comments and discussions. As a result, blogging has become an effective medium for information sharing, personal expression, and digital communication in today’s online world.
Q9. What is an online transaction?
Answer:
An online transaction is a financial activity conducted through the internet. It involves the electronic transfer of money for payments, purchases, or banking services. Common examples include online shopping, mobile banking, utility bill payments, and ticket booking. Online transactions are convenient because they save time and can be completed from anywhere. Secure payment gateways, encryption technologies, and authentication methods help protect financial information during transactions. Users should verify website security and avoid sharing sensitive information with unknown sources. Online transactions have become an essential part of digital commerce and provide fast, efficient, and convenient financial services to users worldwide.
Q10. What precautions should be taken during online transactions?
Answer:
Users should follow several safety measures while performing online transactions. They should use trusted websites with secure HTTPS connections and verify the website’s authenticity. Strong passwords and two-factor authentication should be enabled whenever possible. Personal and banking information should never be shared through emails or messages. Users should avoid conducting transactions on public Wi-Fi networks. Regular monitoring of bank statements helps identify unauthorized activities. Antivirus software and updated browsers should be used for additional protection. Logging out after completing transactions is also important. These precautions reduce the risk of fraud, identity theft, and financial loss during online financial activities.
Q11. What is internet security?
Answer:
Internet security refers to the measures and practices used to protect computers, networks, and users from online threats. It helps safeguard personal information, financial data, and digital resources from unauthorized access and cyberattacks. Internet security includes the use of strong passwords, antivirus software, firewalls, encryption, and safe browsing habits. It protects users against threats such as malware, phishing, hacking, and identity theft. As internet usage continues to increase, maintaining internet security has become essential for individuals and organizations. Good security practices ensure safe online communication, secure transactions, and protection of sensitive information from cybercriminals.
Q12. What is phishing?
Answer:
Phishing is a cybercrime in which attackers attempt to steal sensitive information such as usernames, passwords, banking details, and personal data by pretending to be trustworthy organizations. Phishing attacks usually occur through fraudulent emails, messages, or fake websites that look genuine. Victims are tricked into clicking malicious links or providing confidential information. To avoid phishing, users should verify sender identities, avoid suspicious links, and check website URLs carefully. Security software and awareness of common phishing techniques also help reduce risks. Phishing remains one of the most common online threats because it exploits human trust rather than technical vulnerabilities.
Q13. What is malware?
Answer:
Malware is malicious software designed to damage, disrupt, or gain unauthorized access to computer systems. Common types of malware include viruses, worms, spyware, ransomware, and trojans. Malware can enter a system through infected files, unsafe downloads, malicious websites, or email attachments. It may steal information, slow down system performance, corrupt files, or allow hackers to control devices remotely. Users can protect themselves by installing antivirus software, updating operating systems regularly, and avoiding suspicious downloads. Practicing safe internet usage significantly reduces malware infections. Malware remains a major cybersecurity threat affecting both individuals and organizations worldwide.
Q14. What is a computer virus?
Answer:
A computer virus is a type of malware that attaches itself to files or programs and spreads from one computer to another. Like a biological virus, it replicates and infects systems without the user’s knowledge. Viruses can damage files, slow system performance, corrupt data, and disrupt normal computer operations. They often spread through infected USB drives, email attachments, software downloads, and unsafe websites. Antivirus programs help detect and remove viruses before they cause significant harm. Regular software updates and cautious internet behavior are important preventive measures. Understanding viruses helps users maintain secure and efficient computer systems.
Q15. What is spyware?
Answer:
Spyware is malicious software that secretly monitors a user’s activities and collects information without permission. It may record browsing habits, login credentials, personal details, and other sensitive data. Spyware often enters systems through software downloads, infected websites, or malicious email attachments. Once installed, it operates in the background and may slow down computer performance. The collected information can be used for identity theft, fraud, or unauthorized advertising. Users can prevent spyware infections by installing trusted antivirus software, avoiding suspicious downloads, and keeping systems updated. Awareness and safe browsing practices are essential for protecting personal privacy and security online.
Q16. What is a firewall?
Answer:
A firewall is a security system that monitors and controls incoming and outgoing network traffic. It acts as a protective barrier between a trusted computer network and untrusted external networks such as the internet. Firewalls help block unauthorized access while allowing legitimate communication. They can be hardware-based, software-based, or a combination of both. Organizations and individuals use firewalls to prevent cyberattacks, malware infections, and unauthorized access to sensitive information. Firewalls play a crucial role in cybersecurity by filtering potentially harmful traffic and enforcing security rules. They are an essential component of a secure computer network.
Q17. Why are strong passwords important?
Answer:
Strong passwords are essential for protecting online accounts and personal information from unauthorized access. A strong password typically contains a combination of uppercase and lowercase letters, numbers, and special characters. It should be difficult to guess and should not contain personal details such as names or birth dates. Strong passwords reduce the risk of hacking, identity theft, and data breaches. Users should avoid using the same password for multiple accounts and should change passwords periodically. Password managers can help store complex passwords securely. Strong password practices form the foundation of personal cybersecurity and online account protection.
Q18. What is cyber safety?
Answer:
Cyber safety refers to responsible and secure behavior while using digital technologies and the internet. It focuses on protecting users from online threats such as cyberbullying, phishing, malware, scams, and inappropriate content. Cyber safety involves using strong passwords, maintaining privacy settings, verifying information sources, and avoiding suspicious links or downloads. It also includes respecting others online and following ethical digital practices. Cyber safety awareness is important for students because they spend significant time on the internet for education and communication. By practicing cyber safety, users can enjoy the benefits of technology while minimizing risks to their security and privacy.
Q19. What is the importance of antivirus software?
Answer:
Antivirus software is designed to detect, prevent, and remove malware from computer systems. It scans files, applications, and websites to identify suspicious activities and threats. Antivirus programs protect against viruses, worms, spyware, ransomware, and other malicious software. They provide real-time monitoring and regularly update their virus databases to recognize new threats. Using antivirus software helps maintain system performance, protect personal data, and reduce the risk of cyberattacks. However, antivirus software should be combined with safe browsing habits and regular software updates for maximum security. It is an important tool for ensuring a safe and secure computing environment.
Q20. How can users stay safe on the internet?
Answer:
Users can stay safe online by following good cybersecurity practices. They should create strong passwords, enable two-factor authentication, and regularly update software and operating systems. Avoiding suspicious emails, links, and downloads helps prevent phishing and malware attacks. Users should use secure websites, especially for online transactions, and avoid sharing personal information publicly. Installing antivirus software and firewalls provides additional protection. Regularly backing up important data helps recover information in case of cyber incidents. Practicing digital responsibility and staying informed about emerging online threats are essential for maintaining privacy, security, and confidence while using the internet for education, communication, and business activities.