CBSE Class IX · Computer Applications (165) · Unit 2 · 2026–27

Cyber Safety

Use the web and social networks with care: protect identity, passwords, privacy and confidential information, recognise harmful behaviour and know how to report a cybercrime.

Syllabus concepts

Identity and privacy

Share only information needed for a trusted purpose. Check who can view a profile, post or file. A digital footprint can persist after a post is removed.

Passwords and accounts

Use long, unique passwords or passphrases. Do not reuse a school password on unrelated sites or share one-time codes. Use multi-factor authentication when available.

Cyberstalking and harmful contact

Repeated unwanted online contact, threats or monitoring should be taken seriously. Save relevant evidence, block/report the account and tell a trusted adult or school authority.

Malware

A virus is malicious code that can attach to files and spread when they run. Adware displays unwanted advertising and may track activity. Keep software updated and avoid unknown attachments or downloads.

Reporting

Do not retaliate or circulate harmful content. Preserve dates, links and screenshots where safe, then report through the platform and an appropriate trusted adult or official cybercrime channel.

Worked example

A message claims to be from a school and asks for your password through an unfamiliar link. Check the sender using a known contact method, do not open the link or share credentials, and report the message.

Practice questions with answers

1. Why should passwords be unique?

If one service is compromised, a reused password could expose other accounts. Unique passwords limit the damage.

2. What should a student do after receiving repeated threatening messages?

Save the evidence if safe, stop engaging, block/report the account, and tell a trusted adult or school authority.

3. Does an ad-supported app automatically mean it is malware?

No. Adware specifically involves unwanted advertising behavior and can raise privacy/security concerns; an ordinary app showing clearly disclosed ads is not automatically malware.

Practical task and self-check

Create a small sample task using this unit’s tools. Save it, reopen it, inspect the result and explain one choice you made.

Can I explain the key terms without memorising a paragraph?
Can I demonstrate the task and describe the steps?
Have I checked accuracy, privacy and file organisation?

These are original revision notes aligned to the CBSE Class IX 2026–27 curriculum. Use them with your prescribed NCERT book and your teacher’s directions. Official CBSE syllabus