Computer Science

Complete Revision Notes | Society, Law and Ethics | CBSE Class 11 Computer Science Unit 3 Notes

Class 11 · Computer Science

CBSE Class 11 Computer Science Unit 3: Society, Law and Ethics – Complete Notes

Technology has become an integral part of our daily lives. From education and banking to communication and entertainment, computers and the Internet are used everywhere. Along with the advantages of technology come responsibilities such as protecting personal information, respecting intellectual property, following cyber laws, and using technology ethically. This unit helps students understand responsible digital citizenship, cyber safety, cyber laws, malware, e-waste management, and the importance of creating an inclusive digital society.

These notes are prepared according to the latest CBSE Class 11 Computer Science syllabus and are designed for conceptual understanding, classroom learning, and examination preparation.

Topics Covered

Digital Footprints
Digital Society and Netizen
Data Protection
Cyber Crime
Cyber Safety
Malware
E-Waste Management
Information Technology Act (IT Act)
Technology and Society

Learning Outcomes

After completing this unit, students will be able to:

Understand responsible use of digital technology.
Protect personal information and digital identity.
Recognize common cyber threats.
Understand Intellectual Property Rights.
Follow safe browsing practices.
Understand India's Information Technology Act.
Dispose of electronic waste responsibly.
Promote accessibility and inclusion while using technology.

1. Digital Footprints

Whenever we use the Internet, we leave behind information about our online activities. This information is known as our Digital Footprint. Every search, email, social media post, comment, online purchase, and website visit contributes to our digital footprint.

Definition

A Digital Footprint is the trail of data created by a person's activities on the Internet.

Types of Digital Footprints

Type	Description
Active Digital Footprint	Information intentionally shared by the user, such as social media posts, comments, emails, and online forms.
Passive Digital Footprint	Information collected automatically, such as browsing history, cookies, IP address, and location data.

Examples

Google searches
Instagram posts
YouTube comments
Online shopping history
Email messages
Location history

Importance

Creates online reputation.
Can affect college admissions and employment.
Helps organizations personalize services.
Can impact privacy and security.

Best Practices

Think before posting.
Avoid sharing personal information publicly.
Review privacy settings regularly.
Delete unnecessary online accounts.
Maintain a positive online image.

2. Digital Society and Netizen

Digital Society

A Digital Society is a society in which digital technologies are widely used for communication, education, healthcare, banking, shopping, entertainment, governance, and business.

Netizen

A Netizen is a responsible and ethical citizen of the Internet who follows rules, respects others, and uses digital technologies responsibly.

Characteristics of a Good Netizen

Respects others.
Protects personal information.
Follows cyber laws.
Uses polite language.
Reports cyber crimes.
Does not spread fake news.

Netiquettes (Internet Etiquettes)

Netiquettes are the rules of polite and responsible behaviour while using the Internet.

Be respectful.
Do not use offensive language.
Avoid spamming.
Respect copyright.
Verify information before sharing.
Respect others' privacy.

Communication Etiquettes

Write clear and polite messages.
Use appropriate greetings.
Avoid typing in ALL CAPITAL LETTERS.
Reply professionally.
Check grammar before sending messages.

Social Media Etiquettes

Think before posting.
Do not share fake news.
Respect others' opinions.
Do not bully anyone.
Use strong passwords.
Keep your profile secure.

3. Data Protection

Data Protection refers to safeguarding personal and organizational information from unauthorized access, misuse, loss, or theft.

Importance of Data Protection

Protects personal privacy.
Prevents identity theft.
Protects confidential information.
Builds trust in digital systems.

Intellectual Property Rights (IPR)

Intellectual Property Rights are legal rights provided to creators and inventors to protect their original work and innovations.

Types of Intellectual Property Rights

Type	Protects	Example
Copyright	Creative works	Books, Music, Software
Patent	Inventions	New Machine
Trademark	Brand Identity	Logo, Brand Name

Violation of IPR

Plagiarism: Presenting someone else's work as your own.
Copyright Infringement: Using copyrighted material without permission.
Trademark Infringement: Unauthorized use of a registered trademark.

Open Source Software

Open Source Software allows users to view, modify, and distribute its source code according to its licence.

Popular Open Source Licences

Licence	Purpose
GPL	Requires modified software to remain open source.
Apache Licence	Allows modification and commercial use with licence conditions.
Creative Commons	Allows creators to define how their work can be shared and reused.

Good Practices for Data Protection

Use strong passwords.
Enable two-factor authentication.
Do not share OTPs or passwords.
Backup important data regularly.
Use licensed software.
Respect Intellectual Property Rights.

4. Cyber Crime

As the use of computers and the Internet has increased, crimes committed using digital devices have also increased. These crimes are known as Cyber Crimes. Cyber criminals use computers, mobile devices, and networks to steal information, damage systems, commit fraud, or misuse digital resources.

Definition

A Cyber Crime is any illegal activity that is committed using a computer, mobile device, network, or the Internet.

Common Types of Cyber Crime

Cyber Crime	Description
Hacking	Gaining unauthorized access to a computer system or network.
Eavesdropping	Secretly intercepting or monitoring communication without permission.
Phishing	Attempting to steal usernames, passwords, banking details, or personal information through fake websites, emails, or messages.
Fraud Emails	Fake emails sent to deceive users into sharing confidential information or transferring money.
Ransomware	Malware that locks or encrypts files and demands payment to restore access.
Cyber Trolls	People who deliberately post offensive or provocative messages to disturb others.
Cyber Bullying	Using digital platforms to harass, threaten, embarrass, or insult another person.

Effects of Cyber Crime

Financial loss.
Identity theft.
Loss of confidential information.
Damage to reputation.
Mental stress and anxiety.
Disruption of business or educational activities.

How to Prevent Cyber Crime

Use strong and unique passwords.
Enable Two-Factor Authentication (2FA).
Keep software and operating systems updated.
Avoid clicking unknown links.
Never share OTPs or passwords.
Install antivirus software.
Verify email senders before opening attachments.
Use secure websites (HTTPS).

5. Cyber Safety

Cyber Safety means protecting yourself, your devices, and your personal information while using computers, mobile phones, and the Internet.

Definition

Cyber Safety refers to the safe and responsible use of digital technologies to protect users from cyber threats and online risks.

Important Areas of Cyber Safety

Safe Browsing
Identity Protection
Confidentiality

Safe Browsing

Safe browsing means using the Internet securely and avoiding activities that may expose users to cyber threats.

Guidelines

Visit trusted websites.
Check for HTTPS before entering sensitive information.
Avoid clicking suspicious advertisements.
Download software only from official websites.
Keep browsers updated.
Log out from public computers after use.

Identity Protection

Identity Protection means safeguarding personal information from misuse or theft.

Protect Your Identity By

Using strong passwords.
Enabling Two-Factor Authentication.
Never sharing OTPs or PINs.
Limiting personal information shared online.
Monitoring online accounts regularly.

Confidentiality

Confidentiality means ensuring that sensitive information is accessible only to authorized persons.

Examples

Bank account details.
Passwords.
Medical records.
School examination data.
Personal documents.

Best Practices for Cyber Safety

Create strong passwords.
Change passwords regularly.
Use antivirus software.
Update operating systems.
Backup important data.
Be careful while using public Wi-Fi.
Verify information before sharing.
Think before posting on social media.

6. Malware

Malware is one of the most common cyber threats. It can damage computers, steal information, display unwanted advertisements, or allow unauthorized access to systems.

Definition

Malware (Malicious Software) is software intentionally designed to damage, disrupt, steal information from, or gain unauthorized access to computers or digital devices.

Types of Malware

Type	Description
Virus	Attaches itself to files or programs and spreads when they are executed.
Trojan	Disguises itself as useful software to trick users into installing it.
Adware	Displays unwanted advertisements and may track browsing activities.

Virus

Attaches to files or programs.
Replicates itself.
Can corrupt or delete files.
May slow down the computer.

Trojan

Looks like genuine software.
Steals information.
May create a backdoor for attackers.
Does not normally replicate itself.

Adware

Displays unwanted advertisements.
May redirect web browsers.
Can reduce system performance.
May collect browsing information.

Symptoms of Malware Infection

Computer becomes slow.
Frequent crashes.
Unexpected pop-up advertisements.
Unknown programs appear.
Browser homepage changes automatically.
Files become inaccessible.

How Malware Spreads

Infected email attachments.
Pirated software.
Unsafe websites.
Infected USB drives.
Fake software updates.
Unknown mobile applications.

Prevention of Malware

Install antivirus software.
Keep the operating system updated.
Download software only from trusted websites.
Scan USB drives before use.
Avoid opening suspicious email attachments.
Regularly backup important files.

Comparison of Malware

Virus	Trojan	Adware
Attaches to files	Pretends to be genuine software	Displays advertisements
Self-replicates	Normally does not replicate	Shows pop-up ads
Damages files	Steals information	Tracks browsing activity

7. E-Waste Management

With the rapid advancement of technology, electronic devices are replaced frequently, resulting in a large amount of electronic waste or E-Waste. Improper disposal of electronic waste can harm the environment and human health. Therefore, responsible e-waste management is essential.

Definition

E-Waste (Electronic Waste) refers to discarded electrical and electronic devices that are no longer useful, functional, or required.

Examples of E-Waste

Desktop Computers
Laptops
Mobile Phones
Tablets
Printers
Scanners
Televisions
Monitors
Keyboards
Mouse
Chargers
USB Drives
Hard Disks
Batteries

Why is E-Waste Increasing?

Rapid technological development.
Frequent device upgrades.
Short product life cycle.
Growing use of electronic gadgets.
Changing consumer preferences.

Effects of Improper Disposal

Soil pollution.
Water pollution.
Air pollution.
Loss of valuable recyclable materials.
Health hazards.

Proper Disposal of E-Waste

Donate working devices.
Repair devices whenever possible.
Reuse electronic gadgets.
Recycle through authorised e-waste collection centres.
Erase personal data before disposal.
Use manufacturer take-back programmes where available.

The 5R Principle

R	Meaning
Refuse	Avoid unnecessary electronic purchases.
Reduce	Use devices wisely.
Reuse	Use devices for a longer period.
Repair	Repair instead of replacing.
Recycle	Dispose through authorised recyclers.

8. Information Technology Act (IT Act)

The rapid growth of digital communication, e-commerce, online banking, and e-governance created the need for cyber laws. The Government of India enacted the Information Technology Act, 2000 to provide legal recognition to electronic records and digital transactions.

Definition

The Information Technology Act, 2000 (IT Act) is India's cyber law that provides legal recognition to electronic records and digital signatures and deals with cyber-related offences.

Objectives of the IT Act

Provide legal recognition to electronic records.
Recognise digital signatures.
Promote e-commerce.
Support e-governance.
Address cyber crimes.
Promote secure electronic transactions.

Key Features

Legal recognition of electronic records.
Recognition of digital signatures.
Electronic filing of documents.
Legal framework for online transactions.
Cyber crime provisions.

Electronic Records

Electronic records are documents or information created, stored, received, or transmitted in digital form.

Examples

Emails
PDF Documents
Online Application Forms
Digital Certificates
Electronic Bills

Digital Signature

A Digital Signature is a secure electronic method used to verify the authenticity and integrity of electronic documents.

Benefits

Authenticates the sender.
Ensures document integrity.
Supports secure online transactions.
Reduces paperwork.

Common Cyber Offences Covered

Hacking
Identity Theft
Phishing
Unauthorised Access
Data Theft
Online Fraud

Responsibilities of Internet Users

Follow cyber laws.
Respect others' privacy.
Use licensed software.
Do not spread fake information.
Protect confidential information.

9. Technology and Society

Technology has transformed education, healthcare, communication, banking, and business. However, technology should be accessible to everyone regardless of gender, disability, or background.

Technology and Society

Technology and Society refers to the relationship between technological development and human society, where each influences the other.

Importance of Technology

Improves communication.
Supports digital learning.
Enhances healthcare.
Improves business efficiency.
Creates employment opportunities.

Digital Inclusion

Digital Inclusion means providing equal access to digital technologies for everyone, regardless of gender, age, disability, location, or economic background.

Gender Equality

Gender Equality means providing equal opportunities to all individuals in learning, using, and developing technology irrespective of gender.

Examples

Equal access to computer laboratories.
Equal participation in coding competitions.
Equal opportunities in STEM education.
Equal employment opportunities in IT.

Disability Issues

Some users may face challenges while using computers because of visual, hearing, physical, speech, or learning disabilities. Technology should be designed to reduce these barriers.

Accessibility

Accessibility means designing software, websites, and digital resources so that they can be used by everyone, including persons with disabilities.

Assistive Technologies

Technology	Purpose
Screen Reader	Reads text for visually impaired users.
Screen Magnifier	Enlarges text and images.
Speech Recognition	Converts speech into text.
Voice Typing	Allows users to type using voice.
On-Screen Keyboard	Helps users with limited hand movement.
Closed Captions	Displays subtitles for videos.

Universal Design

Universal Design means designing products, software, and services so that they are usable by the maximum number of people without requiring major modifications.

Inclusive Classroom Practices

Provide equal learning opportunities.
Use accessible study material.
Provide captions in educational videos.
Use readable fonts and good colour contrast.
Encourage participation of every student.
Support students using assistive technologies.

Responsible Digital Citizen

Respect everyone online.
Promote equality and inclusion.
Protect privacy.
Follow cyber laws.
Use technology ethically.

Important Definitions

Term	Definition
Digital Footprint	The trail of information created by a person's online activities.
Netizen	A responsible and ethical Internet user.
Data Protection	Protecting data from unauthorized access, misuse, alteration, or loss.
Copyright	Legal protection provided to creators of original works.
Patent	Legal protection granted for an invention.
Trademark	A symbol, logo, or name that identifies a brand.
Cyber Crime	An illegal activity performed using computers or the Internet.
Cyber Safety	Safe and responsible use of digital technologies.
Malware	Malicious software designed to damage or misuse computer systems.
Virus	Malware that attaches itself to files or programs.
Trojan	Malware that appears to be genuine software.
Adware	Software that displays unwanted advertisements.
E-Waste	Discarded electronic and electrical devices.
IT Act	India's cyber law that provides legal recognition to electronic records and digital transactions.
Accessibility	Designing technology so that everyone can use it.
Digital Inclusion	Providing equal access to digital technologies.

Important Comparison Tables

Types of Digital Footprints

Active	Passive
Shared intentionally	Collected automatically
Posts	Cookies
Comments	Browsing history
Emails	IP Address

Copyright vs Patent vs Trademark

Copyright	Patent	Trademark
Creative Work	Invention	Brand Identity
Books	Machines	Logo
Music	Products	Company Name

Virus vs Trojan vs Adware

Virus	Trojan	Adware
Attaches to files	Pretends to be genuine software	Shows advertisements
Self-replicates	Normally does not replicate	Displays pop-up ads
Damages files	Steals information	Tracks browsing

Equality vs Equity vs Inclusion

Equality	Equity	Inclusion
Same opportunity	Support according to need	Everyone participates

Memory Tricks

Cyber Safety

SAFE

S – Strong Password
A – Antivirus
F – Firewall / 2FA
E – Encrypt & Update

Malware

VTA

V – Virus
T – Trojan
A – Adware

E-Waste

5R Principle

Refuse
Reduce
Reuse
Repair
Recycle

Information Technology Act

LEDS

L – Legal Recognition
E – Electronic Records
D – Digital Signature
S – Secure Transactions

Technology & Society

GAID

G – Gender Equality
A – Accessibility
I – Inclusion
D – Disability Support

Important Exam Tips

Learn all important definitions.
Remember the difference between Copyright, Patent, and Trademark.
Understand the differences between Virus, Trojan, and Adware.
Remember the objectives of the IT Act.
Know the 5R Principle.
Understand Digital Footprints and Cyber Safety.
Revise assistive technologies and accessibility features.
Practice competency-based and case-based questions.

Common Mistakes Students Make

Confusing Copyright with Patent.
Confusing Virus and Trojan.
Forgetting the order of the 5R Principle.
Mixing Equality and Equity.
Ignoring Digital Footprints while answering questions.
Writing incomplete definitions.
Ignoring examples in descriptive answers.

Quick Revision Sheet

Topic	Remember
Digital Footprint	Online trail
Netizen	Responsible Internet user
Cyber Crime	Illegal online activity
Cyber Safety	Protect yourself online
Malware	Virus, Trojan, Adware
E-Waste	5R Principle
IT Act	Cyber Law of India
Accessibility	Technology for everyone

Unit Summary

Unit 3 introduces students to responsible digital citizenship, cyber safety, cyber laws, data protection, intellectual property rights, malware, e-waste management, and inclusive technology. Students learn how to protect their digital identity, respect others online, prevent cyber crimes, use technology ethically, follow the Information Technology Act, and promote equal opportunities through accessible technologies. Understanding these concepts helps students become responsible, safe, and ethical users of digital technologies.

Competency-Based Questions

Question 1

A student frequently shares personal photographs, location, and school information on social media without changing the privacy settings.

Which concept of this unit is related to this situation?
What are the possible risks?
Suggest four preventive measures.

Question 2

A company receives an email asking employees to update their banking details through a provided link.

Identify the cyber crime.
How can employees identify such emails?
Suggest four preventive measures.

Question 3

A school decides to replace all old computers with new ones.

How should the old computers be disposed of responsibly?
Explain the 5R Principle applicable in this case.

Question 4

A visually impaired student is unable to read digital notes displayed on a computer.

Which assistive technology can help?
What accessibility features should be provided?

Question 5

A teacher uploads study material copied directly from another author's website without giving credit.

Which Intellectual Property Right has been violated?
Explain the correct practice.

Assertion–Reason Questions

Assertion (A): Every Internet user leaves a Digital Footprint.

Reason (R): Online activities generate digital records.

Answer: Both A and R are true, and R is the correct explanation of A.

Assertion (A): Strong passwords improve cyber safety.

Reason (R): Strong passwords reduce the possibility of unauthorized access.

Answer: Both A and R are true, and R is the correct explanation of A.

Assertion (A): Copyright protects inventions.

Reason (R): Patents protect inventions.

Answer: Assertion is false, but Reason is true.

Assertion (A): Accessibility helps create an inclusive digital society.

Reason (R): Accessible technology allows persons with disabilities to use digital resources effectively.

Answer: Both A and R are true, and R is the correct explanation of A.

Assertion (A): The Information Technology Act provides legal recognition to electronic records.

Reason (R): Electronic documents can be legally accepted under the Act.

Answer: Both A and R are true, and R is the correct explanation of A.

Case-Based Questions

Case Study 1

A student receives a message stating that he has won a smartphone and needs to click a link and enter his banking details to claim the prize.

Identify the cyber crime.
What mistakes should be avoided?
Suggest four cyber safety measures.

Case Study 2

A software developer publishes an original application. Another person copies the application and distributes it without permission.

Which Intellectual Property Right is violated?
How can such violations be prevented?

Case Study 3

A school website is redesigned with larger fonts, screen reader compatibility, captions for videos, and keyboard navigation.

Which concept of this unit is demonstrated?
Name two accessibility features.
How do these features help students?

Multiple Choice Questions

1. Digital Footprint refers to:

Computer Memory
Internet Speed
Trail of Online Activities
Operating System

Answer: C

Explanation: Every online activity leaves a digital trail called a Digital Footprint.

2. Which of the following is NOT an Intellectual Property Right?

Patent
Trademark
Copyright
Password

Answer: D

3. Which cyber crime attempts to steal confidential information using fake websites?

Virus
Phishing
Adware
Trojan

Answer: B

4. Malware that pretends to be genuine software is called:

Virus
Trojan
Firewall
Spam

Answer: B

5. Which malware mainly displays unwanted advertisements?

Virus
Trojan
Adware
Worm

Answer: C

6. The Information Technology Act was enacted in:

1998
1999
2000
2002

Answer: C

7. Which principle is associated with E-Waste Management?

4D
5R
3A
SAFE

Answer: B

8. Which accessibility feature helps visually impaired users?

Firewall
Screen Reader
Compiler
Antivirus

Answer: B

9. A responsible Internet user is known as:

Hacker
Programmer
Netizen
Administrator

Answer: C

10. Which one promotes equal opportunities in technology?

Gender Equality
Cyber Crime
Malware
Spam

Answer: A

Multiple Choice Questions (11–20)

11. Which of the following protects a brand name or logo?

Copyright
Patent
Trademark
License

Answer: C

Explanation: A trademark protects a brand name, logo, or symbol that distinguishes goods or services.

12. Which software is used to detect and remove malware?

Compiler
Antivirus
Debugger
Assembler

Answer: B

13. Which of the following is an example of electronic waste?

Plastic Bottle
Newspaper
Old Laptop
Wooden Chair

Answer: C

14. Which principle encourages repairing devices instead of replacing them?

5R Principle
Netiquette
Cyber Safety
Digital Footprint

Answer: A

15. Which of the following is an example of assistive technology?

Screen Reader
Printer
Scanner
Firewall

Answer: A

16. Digital Signatures are mainly used to:

Increase Internet speed
Verify the authenticity of electronic documents
Compress files
Delete viruses

Answer: B

17. Which of the following helps protect online accounts?

Weak Password
Sharing OTP
Two-Factor Authentication
Using Pirated Software

Answer: C

18. Which law provides legal recognition to electronic records in India?

Copyright Act
Consumer Protection Act
Information Technology Act
Patent Act

Answer: C

19. Which of the following is considered good netiquette?

Spreading Fake News
Using Offensive Language
Respecting Others Online
Cyber Bullying

Answer: C

20. Technology designed for all users, including persons with disabilities, is called:

Open Source
Universal Design
Malware
Encryption

Answer: B

Short Answer Questions

Define Digital Footprint with one example.
Who is a Netizen?
Differentiate between Copyright and Patent.
What is Phishing?
State four cyber safety measures.
Differentiate between Virus and Trojan.
What is E-Waste?
Explain the 5R Principle.
What is the Information Technology Act?
Define Accessibility.

Long Answer Questions

Explain Digital Footprints and their impact on online reputation.
Discuss Intellectual Property Rights and their importance.
Explain different types of cyber crimes with suitable examples.
Describe Cyber Safety practices that every Internet user should follow.
Explain E-Waste Management and the 5R Principle.
Describe the objectives and features of the Information Technology Act.
Explain the importance of Technology and Society with reference to gender equality and accessibility.

Frequently Asked Questions (FAQs)

1. What is a Digital Footprint?

A Digital Footprint is the trail of information created by a person's online activities.

2. What is Cyber Safety?

Cyber Safety refers to the safe and responsible use of computers, mobile devices, and the Internet.

3. What is Malware?

Malware is malicious software designed to damage, disrupt, or misuse computer systems.

4. What is E-Waste?

E-Waste refers to discarded electronic and electrical devices that are no longer useful.

5. Why is the IT Act important?

The Information Technology Act provides legal recognition to electronic records and digital transactions and addresses cyber-related offences.

CodeStep Academy – Last Minute Revision

Topic	Remember
Digital Footprint	Online trail of activities
Netizen	Responsible Internet user
IPR	Copyright, Patent, Trademark
Cyber Crime	Illegal activity using computers or the Internet
Cyber Safety	Protect devices and personal information
Malware	Virus, Trojan, Adware
E-Waste	Follow the 5R Principle
IT Act	India's Cyber Law (2000)
Accessibility	Technology should be usable by everyone
Universal Design	Design technology for all users

Final Revision Formula

Think → Protect → Respect → Secure → Recycle → Follow the Law → Include Everyone

Think before posting online.
Protect your identity and personal information.
Respect Intellectual Property Rights and other users.
Secure your devices against cyber threats.
Recycle electronic devices responsibly.
Follow the Information Technology Act and cyber ethics.
Include everyone by promoting accessibility and equal opportunities.

With these principles, students can become responsible digital citizens and confidently prepare for CBSE examinations.