NCERT Exercise Solutions — Societal Impacts (Class 11 Computer Science)

How to Use These Solutions

1. Attempt the question yourself first — Read the question, think about your answer, and write it down before looking at the solution. 2. Compare and learn — Check your answer against the solution given here. Note any points you missed. 3. Focus on understanding, not memorising — The solutions explain the reasoning behind each answer. Understand the concept so you can adapt it to different question formats. 4. Practise writing in your own words — Examiners reward original phrasing. Use these solutions as a reference, then rewrite in your own style. 5. Pay attention to key terms — Words in bold are technical terms that examiners look for. Include them in your answers.

Key Concepts — Quick Review

Before diving into the exercise solutions, here is a brief recap of the major topics in this chapter:

• Cybercrime: Any crime involving a computer or network — includes hacking, phishing, identity theft, cyber stalking, and online fraud.
• Hacking vs Cracking: Hacking is gaining unauthorised access (can be ethical); cracking is hacking with malicious intent.
• Phishing: Fraudulent messages or websites designed to steal sensitive information.
• Digital Footprint: The trail of data you leave online — active (intentional) and passive (collected without your knowledge).
• IT Act 2000: India's cyber law defining offences and penalties; amended in 2008.
• Netiquette: Online etiquette rules for respectful digital communication.
• IPR: Copyright, patent, trademark, and trade secret protections for intellectual property.
• Plagiarism: Presenting someone else's work as your own without credit.
• Privacy and Security: Protecting personal data through strong passwords, 2FA, VPNs, and careful cookie management.
• E-Waste: Discarded electronics containing toxic materials that require proper disposal.

Exercise Questions and Answers

Q1. What is cybercrime? Give examples.

Cybercrime is any criminal activity that involves a computer, a networked device, or a network itself. The computer may be the target of the crime, or it may be used as a tool to commit the crime.

Examples of cybercrime:

1. Hacking — Gaining unauthorised access to a computer system to view, steal, or modify data. 2. Phishing — Sending fraudulent emails pretending to be from a bank or company to trick victims into revealing passwords or credit card details. 3. Identity Theft — Stealing someone's personal information (Aadhaar number, bank details) and using it to open fraudulent accounts or make purchases. 4. Cyber Stalking — Repeatedly harassing or threatening a person online through emails, social media, or messaging apps. 5. Online Fraud — Creating fake e-commerce websites or running lottery scams to cheat people out of money. 6. Cyber Bullying — Using digital platforms to humiliate, threaten, or intimidate someone.

Cybercrime is growing because the internet provides anonymity, speed, and global reach to criminals.

Q2. Differentiate between hacking and cracking.

In short, hacking becomes cracking when the intent turns malicious. Ethical hacking (with authorisation) is legal and valuable; cracking is always a crime.

Q3. How can you identify a phishing attempt? What steps should you take to protect yourself?

How to identify phishing:

1. Check the sender's email address — Phishers often use domain names that look similar but have small spelling differences (e.g., [email protected] instead of bankofindia.com). 2. Look for urgent or threatening language — Messages like "Your account will be suspended in 24 hours" are designed to create panic and make you act without thinking. 3. Hover over links before clicking — The displayed link text may look legitimate, but the actual URL may point to a completely different, fake website. 4. Watch for grammar and spelling errors — Legitimate organisations usually send well-written messages. Multiple errors are a red flag. 5. Requests for sensitive information — No genuine bank or company will ask for your password, OTP, or PIN via email or SMS. 6. Generic greetings — Phishing emails often use "Dear Customer" instead of your actual name.

Steps to protect yourself:

• Never click on links in unsolicited emails or messages. Go directly to the website by typing the URL in your browser.
• Verify the website URL — look for https:// and the padlock icon before entering any credentials.
• Enable two-factor authentication (2FA) on all important accounts.
• Keep your browser and antivirus software updated.
• Report suspicious emails to your organisation's IT team or forward them to the official abuse email of the impersonated organisation.

Q4. What is the IT Act 2000? Explain its key provisions.

The Information Technology Act, 2000 is India's primary legislation governing cybercrime, electronic commerce, and digital signatures. It was enacted to provide legal recognition to electronic transactions and to define penalties for various cyber offences.

Key provisions:

IT Act Amendment 2008 added important sections including 66C, 66D, 66E (privacy violation), 67A (sexually explicit material), 67B (child pornography), and 43A (data protection obligations for companies).

Note: Section 66A (offensive messages) was struck down by the Supreme Court of India in 2015 (Shreya Singhal vs Union of India) as it violated the right to free speech.

Q5. Explain the concept of a digital footprint. Differentiate between active and passive digital footprints.

A digital footprint is the trail of data that a person leaves behind while using the internet. Every online activity — searching, posting, purchasing, browsing — contributes to this data trail. Once information becomes part of your digital footprint, it is extremely difficult to remove completely.

Active digital footprint:

This is data you intentionally share online. You are aware that you are creating this data.

Examples:

• Social media posts, comments, and photos you upload.
• Blog articles or forum replies you write.
• Online profiles you create (LinkedIn, Facebook, etc.).
• Emails you send.
• Online forms you fill out and submit.

Passive digital footprint:

This is data collected without your direct knowledge. You may not even be aware that this data is being recorded.

Examples:

• Browsing history tracked by cookies placed on your device by websites.
• Location data collected by mobile apps in the background.
• IP address logs recorded by servers when you visit a website.
• Search queries stored by search engines.
• Analytics data gathered by third-party tracking scripts embedded in web pages.

Key difference: Active footprint data is created by your deliberate actions; passive footprint data is collected automatically by websites, apps, and services as you use them.

Q6. List five rules of netiquette. Why is netiquette important?

Five rules of netiquette:

1. Be respectful — Use polite language. Avoid abusive, offensive, or discriminatory words. Treat others online the way you would treat them face-to-face. 2. Do not type in ALL CAPS — Writing in capital letters is considered shouting in online communication. Use normal case unless you genuinely need to emphasise something. 3. Respect others' privacy — Do not share someone else's personal information, photos, or contact details without their permission. 4. Think before you post — Consider how your words might affect others. Once something is posted online, it is difficult to take it back. 5. Give credit where it is due — When sharing someone else's work, ideas, or content, always acknowledge the original creator. Do not present others' work as your own.

Why netiquette is important:

• It promotes a safe and respectful online environment.
• It prevents misunderstandings and conflicts in digital communication.
• It protects your reputation and the reputation of others.
• It helps build trust and positive relationships in online communities.
• Without netiquette, online spaces can become hostile, abusive, and unproductive.

Q7. What is Intellectual Property Rights (IPR)? Explain its types.

Intellectual Property Rights (IPR) are legal rights granted to creators and inventors to protect their original works, inventions, and brand identities. IPR gives creators exclusive rights to control how their intellectual property is used and to benefit financially from it.

Types of IPR:

IPR encourages innovation and creativity by ensuring that creators can benefit from their work. Violating IPR through piracy, counterfeiting, or unauthorised copying is a punishable offence under law.

Q8. How can you protect your privacy online?

Protecting your privacy online requires a combination of good habits, technical tools, and awareness. Here are the key measures:

1. Use strong passwords — Create passwords with at least 12 characters, including uppercase and lowercase letters, numbers, and symbols. Avoid using personal information such as your name or birthdate.

2. Use different passwords for different accounts — If one account is compromised, your other accounts remain safe. Consider using a password manager to keep track of multiple passwords.

3. Enable two-factor authentication (2FA) — After entering your password, 2FA requires a second verification step (a code sent to your phone or generated by an authenticator app). This makes it much harder for attackers to access your accounts.

4. Manage cookies — Clear cookies regularly from your browser. Use browser settings to block third-party cookies that track you across websites. Consider using privacy-focused browsers.

5. Use a VPN on public Wi-Fi — A Virtual Private Network encrypts your internet connection and hides your IP address, protecting your data from interception on unsecured networks.

6. Be cautious with personal information — Do not share sensitive details (address, phone number, financial information) on social media or unverified websites.

7. Check privacy settings — Review and adjust the privacy settings on your social media accounts. Limit who can see your posts and personal details.

8. Think before you post — Remember that anything you share online becomes part of your digital footprint. Once it is on the internet, it is nearly impossible to remove completely.

Q9. What is e-waste? Why is it a concern, and how should it be disposed of?

E-waste (electronic waste) refers to discarded electrical and electronic devices — old computers, mobile phones, televisions, printers, batteries, and other electronic equipment that are no longer in use.

Why e-waste is a concern:

• E-waste contains hazardous substances such as lead, mercury, cadmium, and brominated flame retardants.
• When dumped in landfills or burned informally, these toxic materials leach into soil and groundwater or release harmful gases into the air.
• This causes serious health problems including respiratory diseases, neurological damage, skin disorders, and cancer — especially for workers in informal recycling operations who handle e-waste without protective equipment.
• India is among the world's largest generators of e-waste, and a significant portion is processed in the informal sector without proper safety measures.

Proper disposal methods:

1. Recycling at authorised facilities — Certified e-waste recyclers extract valuable metals (gold, copper, silver) and safely dispose of hazardous materials. 2. Reuse and donation — Working devices can be donated to schools, charities, or sold to extend their useful life. 3. Manufacturer take-back programmes — Many electronics companies offer take-back schemes where they collect and responsibly recycle their old products. 4. E-waste collection centres — Government-authorised collection centres accept e-waste for safe processing.

India's E-Waste (Management) Rules, 2016 mandate proper collection, storage, and disposal of e-waste and enforce Extended Producer Responsibility (EPR), making manufacturers accountable for the end-of-life management of their products.

Q10. What is plagiarism? How can it be avoided?

Plagiarism is the act of using someone else's words, ideas, or creative work and presenting them as your own without giving proper credit to the original source. It is considered unethical and, when it involves copyrighted material, can also be illegal.

Types of plagiarism:

• Direct plagiarism — Copying text word-for-word without using quotation marks or citing the source.
• Paraphrasing plagiarism — Rewriting someone's ideas in your own words but failing to credit the original author.
• Self-plagiarism — Submitting your own previously submitted work as new work without disclosure.
• Mosaic plagiarism — Mixing phrases and sentences copied from various sources into your own writing without citing any of them.

How to avoid plagiarism:

1. Always cite your sources — Whether you quote directly or paraphrase, provide a proper citation using a standard format (APA, MLA, or as specified by your institution). 2. Use quotation marks for direct quotes — When you copy text word-for-word, enclose it in quotation marks and cite the source. 3. Paraphrase properly — Rewrite the idea completely in your own words and style, and still cite the original source. 4. Keep a reference list — As you research, maintain a running list of all sources you have consulted so you can cite them accurately. 5. Use plagiarism detection tools — Before submitting your work, run it through tools like Turnitin, Grammarly, or QuillBot to check for unintentional plagiarism.

Plagiarism can result in loss of marks, academic expulsion, and damage to your professional reputation. Developing honest research and writing habits is essential for academic and professional success.

Related Resources

• [Chapter 11 Guide — Societal Impacts](/school/cbse/class/11/computer-science/cbse-societal-impacts) — Complete chapter notes, definitions, and revision material.
• [All Class 11 Computer Science Solutions](/school/cbse/class/11/computer-science/solutions) — Exercise solutions for every chapter.
• [Class 11 Computer Science Subject Guide](/school/cbse/class/11/computer-science) — Overview of the full syllabus with chapter-wise links.