Top 25 Interview Questions on HTML Language for 2025

1. What is HTML?

HTML (HyperText Markup Language) is the standard language used to create web pages. It structures content on the web, using tags and attributes to define elements like headings, paragraphs, images, links, and more.

2. What are the different versions of HTML?

The main versions of HTML are:

HTML 1.0 (1991) – The first version of HTML.
HTML 4.01 (1999) – The last version before HTML5.
HTML5 (2014) – The most current version, offering new features for modern web development.

3. What is the difference between HTML and XHTML?

XHTML is a stricter version of HTML, which must be well-formed and follows XML rules. HTML, on the other hand, is more lenient with syntax and does not require strict adherence to XML standards.

4. What are semantic HTML elements?

Semantic HTML elements clearly describe their meaning in a human- and machine-readable way. Examples include <article>, <section>, <nav>, <header>, and <footer>. These elements help improve accessibility and SEO.

5. What is the purpose of the `<head>` tag in HTML?

The <head> tag contains meta-information about the document, such as the title, character encoding, linked stylesheets, and external scripts. It does not display any content to the user.

6. What are the differences between the `<div>` and `<span>` tags?

<div> is a block-level element, used to group large sections of content.
<span> is an inline element, used to group smaller chunks of content without affecting the layout.

7. What is the difference between the `<ul>` and `<ol>` tags?

<ul> is used for unordered lists, displaying items with bullet points.
<ol> is used for ordered lists, displaying items with numbered points.

8. Explain the `<a>` tag and its attributes.

The <a> tag defines hyperlinks in HTML. Key attributes include:

href: Specifies the URL the link points to.
target: Determines where to open the linked document (e.g., _blank for a new tab).
title: Provides additional information on hover.

9. What are HTML attributes?

HTML attributes provide additional information about HTML elements. They are written within the opening tag and consist of a name and a value (e.g., src="image.jpg" for an image tag).

10. What is the role of the `<img>` tag in HTML?

The <img> tag is used to embed images on a webpage. The src attribute specifies the image source, and the alt attribute provides a text description for accessibility.

11. What is the purpose of the `alt` attribute in an image tag?

The alt attribute provides a text description of an image, improving accessibility for users with visual impairments and offering a fallback when the image cannot be loaded.

12. How do you create a table in HTML?

You create a table using the <table> tag, with nested <tr>, <th>, and <td> tags to define rows, header cells, and data cells, respectively.

<table>
  <tr>
    <th>Header 1</th>
    <th>Header 2</th>
  </tr>
  <tr>
    <td>Row 1, Cell 1</td>
    <td>Row 1, Cell 2</td>
  </tr>
</table>

13. What is the `<form>` tag and how does it work?

The <form> tag is used to collect user input. It can contain form elements like text fields, radio buttons, checkboxes, and submit buttons. The form data is sent to a server for processing when submitted.

14. What is the difference between the `<input>` tag and the `<textarea>` tag?

<input> is used for single-line inputs like text fields, checkboxes, and radio buttons.
<textarea> is used for multi-line input areas, allowing users to type longer text.

15. What are the HTML5 input types?

HTML5 introduced several new input types, such as:

email
date
number
url
range These allow for better input validation and user experience.

16. Explain the `<meta>` tag in HTML.

The <meta> tag provides metadata about the webpage, such as character encoding, author, and viewport settings. It’s typically placed inside the <head> tag.

17. What is the difference between `<strong>` and `<b>` tags?

<strong> is used to indicate strong emphasis, often displayed in bold. It also carries semantic meaning.
<b> is used purely for styling (bold text) without implying any emphasis.

18. How do you include external CSS or JavaScript files in an HTML document?

To include an external CSS file, use the <link> tag within the <head> section: <link rel="stylesheet" href="styles.css">
To include an external JavaScript file, use the <script> tag: <script src="script.js"></script>

19. What is the `<link>` tag used for in HTML?

The <link> tag is used to link external resources like stylesheets to the HTML document. It is usually placed inside the <head> section.

20. What is the purpose of the `viewport` meta tag?

The viewport meta tag controls how a webpage is displayed on different devices, especially mobile devices. It helps ensure the page is responsive by defining the page’s width and scaling.

21. What is the difference between the `<header>` and `<nav>` tags?

<header> represents the introductory content or navigational links for a section or webpage.
<nav> is used to define a block of navigation links, such as menus or a site’s primary navigation.

22. What is the `<iframe>` tag used for?

The <iframe> tag is used to embed another HTML page within the current page. It’s often used to embed content like videos, maps, or external web pages.

23. What is the `class` attribute in HTML?

The class attribute assigns one or more class names to an element, which can be targeted with CSS for styling or JavaScript for functionality.

24. What is the `id` attribute in HTML?

The id attribute assigns a unique identifier to an element, which can be used for CSS styling, JavaScript manipulation, or linking directly to specific elements on the page.

25. What are HTML5 APIs, and can you name a few?

HTML5 introduces several powerful APIs for web development, such as:

Geolocation API: Allows access to the user’s geographic location.
Canvas API: Enables drawing and rendering graphics on the fly.
Local Storage API: Provides a way to store data on the user’s browser.

Conclusion

Mastering HTML is an essential part of web development, and these 25 interview questions will help you prepare for any HTML-related interview in 2025. Whether you’re just starting or have been working with HTML for years, revisiting these concepts will ensure you’re up-to-date with current web development standards.

Don’t forget to practice your skills and stay curious about the evolving world of web technologies!

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By mastering these fundamental HTML questions, you’ll be well-equipped for your next web development interview. Happy coding!

Top 25 Interview Questions on HTML Language for 2025

1. What is HTML?

2. What are the different versions of HTML?

3. What is the difference between HTML and XHTML?

4. What are semantic HTML elements?

5. What is the purpose of the <head> tag in HTML?

6. What are the differences between the <div> and <span> tags?

7. What is the difference between the <ul> and <ol> tags?

8. Explain the <a> tag and its attributes.

9. What are HTML attributes?

10. What is the role of the <img> tag in HTML?

11. What is the purpose of the alt attribute in an image tag?

12. How do you create a table in HTML?

13. What is the <form> tag and how does it work?

14. What is the difference between the <input> tag and the <textarea> tag?

15. What are the HTML5 input types?

16. Explain the <meta> tag in HTML.

17. What is the difference between <strong> and <b> tags?