HTML Interview Questions & Answers
Beginner Level Questions
Explore the fundamentals of HTML with our collection of essential beginner-level questions.
Advance Level Questions
Deepen your HTML knowledge with our advanced questions that cover state management and cross-platform compatibility.
Expert Level Questions
Master HTML with our expert-level questions that delve into performance optimization and the inner workings of the HTML bridge.
Question 1:- What is HTML and what does it stand for?
Answer: - HTML stands for HyperText Markup Language.
- It is the standard language used to create and design web pages.
- HTML provides the structure for web documents by using tags and elements.Question 2:- What are the main differences between HTML and HTML5?
Answer: - **HTML5** includes new elements and attributes not present in older versions.
- New semantic elements like `<header>`, `<footer>`, `<article>`, and `<section>` improve document structure.
- HTML5 also introduces new input types for forms, multimedia elements like `<video>` and `<audio>`, and the Canvas API for graphics.Question 3:- What is the purpose of the `<!DOCTYPE>` declaration in HTML?
Answer: - The `<!DOCTYPE>` declaration defines the document type and version of HTML being used.
- It helps the browser render the page correctly by specifying the HTML version.
- Example:
```html
<!DOCTYPE html>
```Question 4:- What are semantic HTML elements and why are they important?
Answer: - Semantic HTML elements clearly describe their meaning in a human- and machine-readable way.
- Examples include `<header>`, `<footer>`, `<article>`, and `<nav>`.
- They improve accessibility, SEO, and maintainability of web pages by providing clear structure.Question 5:- What is the difference between `<div>` and `<span>` in HTML?
Answer: - **`<div>`**: A block-level element used for grouping and styling larger sections of content.
- **`<span>`**: An inline element used for styling smaller portions of text or other inline elements.
- `<div>` starts on a new line and takes up the full width available, while `<span>` does not.Question 6:- What is the purpose of the `<meta>` tag in HTML?
Answer: - The `<meta>` tag provides metadata about the HTML document.
- Common uses include specifying character encoding, author information, and viewport settings.
- Example:
```html
<meta charset="UTF-8">
<meta name="description" content="A brief description of the page">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
```Question 7:- How do you create a form in HTML and what are some common form elements?
Answer: - Forms are created using the `<form>` tag.
- Common form elements include:
- `<input>`: For text fields, checkboxes, radio buttons, etc.
- `<textarea>`: For multi-line text input.
- `<select>`: For drop-down lists.
- `<button>`: For submitting the form.
- Example:
```html
<form action="/submit" method="post">
<input type="text" name="username">
<input type="submit" value="Submit">
</form>
```Question 8:- What are HTML attributes and how are they used?
Answer: - HTML attributes provide additional information about HTML elements.
- They are placed within the opening tag of an element and follow a `name="value"` format.
- Examples:
- `<a href="https://example.com">Link</a>` (where `href` is an attribute of the `<a>` element)
- `<img src="image.jpg" alt="Description"> (where `src` and `alt` are attributes of the `<img>` element)Question 9:- What is the `<iframe>` tag used for in HTML?
Answer: - The `<iframe>` tag is used to embed another HTML document within the current page.
- It creates an inline frame that can display content from another source.
- Example:
```html
<iframe src="https://example.com" width="600" height="400"></iframe>
```Question 10:- How can you include external CSS and JavaScript files in an HTML document?
Answer: - **CSS**: Use the `<link>` tag within the `<head>` section.
- Example:
```html
<link rel="stylesheet" href="styles.css">
```
- **JavaScript**: Use the `<script>` tag, preferably at the end of the `<body>` section or within the `<head>` with a `defer` attribute.
- Example:
```html
<script src="script.js" defer></script>
```Question 11:- What is the purpose of the `<title>` tag in HTML?
Answer: - The `<title>` tag sets the title of the web page.
- It appears in the browser's title bar or tab.
- Example:
```html
<title>My Web Page</title>
```Question 12:- How do you create a hyperlink in HTML?
Answer: - Use the `<a>` tag with the `href` attribute to create a hyperlink.
- Example:
```html
<a href="https://example.com">Visit Example</a>
```Question 13:- What is the difference between `<b>` and `<strong>` tags in HTML?
Answer: - **`<b>`**: Makes text bold but does not indicate any importance.
- **`<strong>`**: Makes text bold and indicates that the text is of strong importance.
- Example:
```html
<b>Bold text</b>
<strong>Important text</strong>
```Question 14:- How do you create a list in HTML and what are the different types?
Answer: - **Ordered List**: Use the `<ol>` tag with `<li>` elements.
- **Unordered List**: Use the `<ul>` tag with `<li>` elements.
- **Definition List**: Use the `<dl>`, `<dt>`, and `<dd>` tags for term definitions.
- Example:
```html
<ul>
<li>Item 1</li>
<li>Item 2</li>
</ul>
<ol>
<li>First</li>
<li>Second</li>
</ol>
<dl>
<dt>Term</dt>
<dd>Definition</dd>
</dl>
```Question 15:- What are HTML data attributes and how are they used?
Answer: - Data attributes are custom attributes that store extra information on HTML elements.
- They are prefixed with `data-` and can be accessed using JavaScript.
- Example:
```html
<div data-role="admin" data-id="123">Content</div>
```
- Accessing data attributes in JavaScript:
```javascript
let role = document.querySelector('div').getAttribute('data-role');
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