Here are top HTML interview questions.
1. What is HTML?
HTML stands
for HyperText Markup Language. It is the standard markup language used to
create web pages and defines the structure and content of a web page.
2. What is the basic structure of an
HTML document?
The basic
structure of an HTML document consists of the following elements:
```html
<!DOCTYPE html>
<html>
<head>
<title>Title of the
Page</title>
</head>
<body>
<!-- Content of the web page goes
here -->
</body>
</html>
```
3. What are the new semantic
elements introduced in HTML5?
HTML5
introduced several semantic elements, including `<header>`,
`<footer>`, `<nav>`, `<article>`, `<section>`,
`<aside>`, `<main>`, and more. These elements provide more
meaningful structure to web documents.
4. What is the purpose of the
`<meta>` tag?
The
`<meta>` tag provides metadata about the HTML document, such as the
character encoding, author, description, keywords, and viewport settings for
responsive design.
5. What is the difference between
`<div>` and `<span>` elements?
-
`<div>`: A block-level element used to group content together and create
layout structures.
-
`<span>`: An inline element used to apply styles to a specific portion of
text or content within a block-level element.
6. What are inline elements and
block-level elements?
- Inline
elements: Take up only as much space as necessary and do not start on a new
line. Examples include `<span>`, `<a>`, and `<strong>`.
-
Block-level elements: Start on a new line and take up the full width available.
Examples include `<div>`, `<p>`, and `<h1>` to `<h6>`.
7. What is the purpose of the
`<iframe>` element?
The
`<iframe>` element is used to embed another HTML page or external content
within the current web page. It is commonly used for displaying videos, maps,
or content from other websites.
8. Explain the difference between
GET and POST methods in HTML forms.
- GET:
Sends form data as URL parameters and is visible in the URL. Suitable for
retrieving data and not recommended for sensitive information.
- POST:
Sends form data in the request body and is not visible in the URL. Suitable for
sending sensitive information and modifying server-side data.
9. What is the purpose of the
`<img>` element?
The
`<img>` element is used to embed images in a web page. It requires a
`src` attribute to specify the image file URL.
10. How do you create a hyperlink in
HTML?
You can
create a hyperlink using the `<a>` element and the `href` attribute. For
example:
```html
<a
href="https://www.example.com">Visit Example Website</a>
```
11. What are data attributes in
HTML5?
Data
attributes are custom attributes that can be added to HTML elements using the
"data-" prefix. They provide a way to store additional data
associated with an element.
12. Explain the purpose of the
`<table>` element and its essential child elements.
The
`<table>` element is used to create tabular data. Its essential child
elements are `<tr>` (table row), `<td>` (table data/cell), and
`<th>` (table header cell).
13. How do you create a numbered
list and a bullet list in HTML?
- Numbered list: Use the `<ol>` element
with `<li>` elements for each list item.
- Bullet list: Use the `<ul>` element
with `<li>` elements for each list item.
14. What is the use of the
`<form>` element in HTML?
The
`<form>` element is used to create an HTML form that allows users to
input data and submit it to a server for processing.
15. What is the purpose of the
`<label>` element in HTML forms?
The
`<label>` element is used to associate a label with an input element,
making it more accessible. Clicking the label will focus on the associated
input.
16. How do you add comments in HTML?
HTML
comments are added using the `<!-- ... -->` syntax. Anything between
these delimiters will be treated as a comment and not displayed on the web
page.
17. What is the `<audio>`
element used for?
The
`<audio>` element is used to embed audio content, such as music or sound
effects, in a web page. It supports various audio formats.
18. Explain the difference between
the `<script>`, `<script async>`, and `<script defer>`
attributes.
-
`<script>`: Loads and executes the script synchronously, blocking HTML
parsing until the script is fully executed.
-
`<script async>`: Loads the script asynchronously, allowing HTML parsing
to continue while the script loads. The script will execute as soon as it is
available, potentially before the page has fully loaded.
-
`<script defer>`: Loads the script asynchronously, similar to the `async`
attribute, but ensures that the script will execute in order after the HTML
document has been fully parsed.
19. What is the purpose of the
`<canvas>` element in HTML5?
The
`<canvas>` element is used to draw graphics, animations, or other visual
images dynamically using JavaScript.
20. How do you embed a YouTube video
in an HTML page?
To embed a
YouTube video, you can use an `<iframe>` element with the video's embed
URL as the `src` attribute. For example:
```html
<iframe width="560"
height="315" src="https://www.youtube.com/embed/VIDEO_ID"
frameborder="0" allowfullscreen></iframe>
```
Above are few top HTML interview questions. Remember to prepare and expand on these answers.
Good luck with your interview! 👍
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