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Grade XII IT (802)

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Ch-2 Operating Web-Based Applications

School Revise · Class 12 Information Technology · Chapter 2

Operating Web-Based Applications

Code 802, Class 12. Web pages are built with HTML and run in a browser. Here we learn the main HTML tags and how web applications work.

HTML

builds web pages

 

marks up content

What this chapter is about

A web-based application runs in a browser over the internet. Web pages are written in HTML, which uses tags to mark up the content.

1. HTML basics

HTML uses tags in angle brackets. A heading uses h1 to h6, a paragraph uses p, and most tags come in pairs that open and close.

A heading and a paragraph: (h1) My Page (/h1) (p) Welcome to School Revise (/p)

2. Links, images and lists

A link uses the a tag with href, an image uses the img tag with src, and a list uses ul (unordered) or ol (ordered) with li items.

3. Forms and working online

A form collects input using the input tag, so users can type data and send it. Web applications like email and online shopping run this way in the browser.

Practise with the interactive

Explore the idea by tapping. The interactive opens right here in the lesson.

[sr_g12_it802 id=”g12-it802-ch2″]

Coding practice problems, with answers

Type each one into the code lab above, then open the card to see the worked solution and its output.

Problem 1. Write a heading.

SOLUTION

<h1>Welcome to School Revise</h1>

OUTPUT

a large heading: Welcome to School Revise
Problem 2. Write a paragraph.

SOLUTION

<p>This is a web page.</p>

OUTPUT

the text: This is a web page.
Problem 3. Make text bold.

SOLUTION

<b>Important</b>

OUTPUT

the word Important in bold
Problem 4. Add a link.

SOLUTION

<a href=”https://schoolrevise.com”>Visit</a>

OUTPUT

a clickable link that says Visit
Problem 5. Add an image.

SOLUTION

<img src=”logo.png” alt=”Logo”>

OUTPUT

the image logo.png is shown
Problem 6. Make an unordered list.

SOLUTION

<ul><li>Maths</li><li>Science</li></ul>

OUTPUT

a bulleted list: Maths, Science
Problem 7. Add a line break.

SOLUTION

Line one<br>Line two

OUTPUT

Line one and Line two on two lines
Problem 8. Write the page structure.

SOLUTION

<html><head><title>My Page</title></head><body></body></html>

OUTPUT

a basic web page structure
Problem 9. Make a simple table.

SOLUTION

<table><tr><td>A</td><td>B</td></tr></table>

OUTPUT

a one row table with A and B
Problem 10. Add a text input box.

SOLUTION

<input type=”text”>

OUTPUT

a box where the user can type text

Practice set A, multiple choice

1. Web pages are written in …

HTML.

2. Which tag makes a paragraph?

The p tag.

3. Which tag adds a link?

The a tag (with href).

4. Which tag collects user input?

The input tag (in a form).

Quick summary

A web-based application runs in a browser. Web pages are written in HTML, which uses tags in angle brackets, most in open and close pairs. Headings use h1 to h6, paragraphs use p, links use a with href, images use img with src, and lists use ul or ol with li. A form uses input to collect user data, which is how web applications work.
Open the Virtual Lab

These free Class 12 Information Technology (Code 802) notes explain operating web-based applications, HTML tags, headings paragraphs links images and lists, and forms with worked examples and practice, for CBSE students across India and the Gulf including the UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.

© 2026 School Revise. All rights reserved. Original content aligned to the CBSE and NCERT Class 12 Information Technology syllabus. Unauthorised copying is not permitted.

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