Here are 40+ common HTML interview questions and answers that we think will help you with the toughest interviews.
HTML stands for Hypertext Markup Language. It is probably the most widely used and popular programming language for developing web applications. Created in 1919 by Berners-Lee, HTML, first published in 1995, has evolved over the years and has gone through several versions. Released in 1999, HTML 4 is an innovative version of its evolution that has been widely adopted and popular around the world. The latest and latest version is HTML5 released in 2012.
In this article, we’ll cover the top 30 HTML interview questions you need to know to crack those tricky interviews and land your dream job.
HTML Interview Questions and Answers
1. Do you mean meta tags?
It is mainly used in web browsers and search engines for keyword research. The <meta> tag provides information about HTML documents. Metadata is data about data. Used to store details such as page expiration date, page author, keyword list, page description, etc.
2. Do you mean semantic HTML?
Semantic HTML is a programming style. It basically uses HTML markup to enhance the meaning of the content. Example: Semantic HTML recommends using <strong> tags instead of <b> tags for bold declarations. Similarly, it is recommended to use the <em> tag instead of the <i> tag for statements in italics.
3. What is HTML LongDesc?
Longdesc is an attribute that allows you to provide a link to another page that contains a description of the frame content. Example: longdesc = “framedescription.html”.
4. Explain the disadvantages of using FRAME tags.
- Some compact devices such as tablets and mobile phones cannot process content inside the FRAME tag due to screen resolution issues.
- Your browser’s back button may not work as expected.
- Web page display may vary depending on the device.
- Few browsers do not support FRAME tags
5. What is the cell spacing?
Cell spacing is an attribute that defines the border width of an HTML web page. Basically, check the space between table cells. This is done by determining the pixel width.
6. What is Form Get?
The form data is URL encoded by the browser. Form data is displayed in URLs that help mark up content. Form data is limited to ASCII code.
7. What is a marquee?
This selection is used to display scrolling text on web pages. The text to be scrolled must be entered in the <marquee>……</marquee> tag. You can optionally add color to the text and scrolling sequence.
8. How do I convert an image into a background image for a web page?
To create an image as the background of a particular web page, you must use the BODY tag after the HEAD tag.
Example: <BODY background=”image1.png”>
The background is the attribute that is the origin of the image.
9. What is the difference between HTML and HTML5?
HTML 1.0 contains all the specifications for representing text and images on web pages. It also includes the provision of semantic data that allows automatic classification and correlation of HTML documents.
HTML5 is very different from HTML5. It is an application development platform that includes text, images, video, audio, interactive 2D and 3D graphics, in-app data storage, real-time networks, etc.
10. What is a button tag?
Button tags are supported in the latest version of HTML, HTML 5. It is mainly used to create buttons in the HTML form of a webpage. You can click this button to generate an event. Typically used to create a “reset” or “submit” button.
15. What is the difference between HTML elements and tags?
HTML elements are used to pass details to web browsers for text rendering purposes. If HTML elements are enclosed in <> brackets, they will be converted to HTML tags. Tags are usually provided in pairs and surround the content.
16. Do you mean DIV tags?
A DIV is a commonly used container or area for layouts of items or groups of items. DIVs are basically used to highlight areas or blocks of text on TML web pages so you can apply styles. The DIV tag is also an alternative to the Paragraph <p> tag because it creates a logical partition of the HTML document.
42. What is an EMBED tag?
Embed tags are used to embed video or audio in an HTML document. The inline tag requires an end tag. You must display the source video or audio file on the page.
Syntax: <EMBED> Source Files </EMBED>
43. Explain the term pseudo-class.
Pseudo-classes are used to improve the efficiency of hover actions, link colors, and certain other HTML elements. Pseudo-classes are similar to normal HTML classes. The only difference is that it’s not explicitly defined in the HTML markup. Pseudo-classes are defined by listing a colon and class elements after the selector.
9. What is the difference between SPAN and DIV?
A DIV is a commonly used container or area for layouts of items or groups of items. DIVs are basically used to highlight areas or blocks of text in HTML web pages so that styles can be applied. The DIV tag is also an alternative to the Paragraph <p> tag because it creates a logical partition of the HTML document.
SPAN is used to format the elements in a SPAN block. SPAN is used to select inline text and allows users to apply different styles. It does not have its own container or zone.
10. Describe the tags.
Tags are basically used to tell the browser what the browser should do. When you write text in an HTML web page, you usually write the text in tags that help you understand what your browser should do.
11. Describes how Z-index works.
When you use CSS to place elements in an HTML document, they can overlap. Z-index is used to avoid this duplication. It is essentially an integer and can contain positive and negative values. The default is zero.
12. Describes how to apply CSS to an HTML document.
The following methods are used to include CSS styles in your HTML document.
Inline: This is a great way to style a single element in an HTML document. You must insert a STYLE tag inside a paragraph tag such as <p> or <a> to set the STYLE tag.
- Internal: This is achieved by setting the HEAD of the HTML document by including the attribute inside the STYLE tag.
- External: This is done by creating another .CSS file and including this LINK in the HTML document. This can cause longer page load times.
13. List the disadvantages of external style sheets:
- In order to import each HTML document’s style information from your own .CSS file, you need to upload more data.
- If the style sheet is not loaded correctly, you will not be able to view the HTML document.
- It is not recommended to use an external CSS file for a small amount of style definitions on a single page.
14. How to include comments in HTML?
HTML is an SGML application, so HTML uses SGML comment syntax. The full syntax is complicated and most browsers don’t support it. Therefore, the shortest but best way is:
HTML Comment: <! -Comment ->
15. What is a form post?
The name-value pair is sent in the message body of the HTTP request using the post form. Name-value pairs cannot be displayed in the web browser bar. There is no limit to the length of the string.
16. What is a Script?
Scripts are part of a program that allows you to add interactivity to your website. Scripts are useful for generating pop-up warning messages and creating drop-down menus. You can use one of the scripting languages, such as VBScript or JavaScript, to write concise functions called event handlers and use HTML attributes to activate those functions.
17. Can a web page contain multiple headers in a single HTML document?
Yes. An HTML document can contain multiple headers in a document. The HEADER tag is generally used to perform a related function, regardless of its parent section. Therefore, HEADER tag can be included in BODY tag, ARTICLE tag, etc.
18. Describes the FONT tag.
FONT tags are used to manipulate the shape and size of text on web pages. Requires an end tag. However, the FONT and BASEFONT tags have been removed from HTM5. Therefore, the best option to modify the font is to use it in CSS. He has the following attributes: color, size, face, etc.
19. Use HTML5 Features.
- Provisioning JavaScript application programming interface (API) extensions, including caching, geolocation, storage and drag-and-drop, etc.
- Updated list of form controls: <time>, <url>, <calendar>, <email>, <date> and <search>.
- Improved support for graphics, video and audio data by incorporating tags such as <video>, <canvas> and <audio>.
- Updated semantic tags such as <main>, <aside>, <section>, <nav>, <header>, <article> and <footer>.
20. Is it possible to include Javascript code in an HTML Web page? If so, how?
<script type="text/javascript">
</script>
<html>
<Main Body>
<Script>
Warning ("Hello, What's a problem!")
</script>
</body>
</html>
21. Attach the internationalization attribute of the XHTML element.
- XML: language
2.DIRET - Language
22. What is CSS?
CSS is short for Cascading Style Sheets. It provides a simple and efficient alternative for specifying various HTML tag attributes. You can use CSS to refer to style properties of any HTML element. You don’t need to write the details individually for each webpage, just create a .CSS file and enter the details there. Automatic update on all .HTML web pages.
23. What is the difference between Form Get and Form Post?
Get
The form data is URL encoded by the browser. Form data is displayed in URLs that help mark up content. Form data is limited to ASCII code.
Post
The name-value pair is sent in the message body of the HTTP request using the post form. Name-value pairs do not appear in the web browser bar. There is no limit to the length of the string.
Form Post and Form Get most often respond to different HTTP requests and are sent in different ways. Data is encoded in different ways and may require different decoding techniques.
24. Join the form elements.
Modules consist of various elements, including:
- Text field
- Text area field
- Drop-down menu
- Radio button
- Checkbox
25. Would you like to explain the DOCTYPE tag in HTML?
Refers to the document type definition. Mention the browser’s markup language rules for displaying content correctly. Currently, DOCTYPE is not required in HTML5. However, it must be placed before the HTML tag, which is the first line of the HTML document. This is not an HTML tag, but an instruction for the web browser that indicates the version of the markup language in which the web page is written.
34. Do all HTML tags have an exit tag?
no. In most cases it has an end tag. However, few do not require the final tag, such as the <BR /> tag or the <HR /> tag. It is not mandatory to use the end tag for these two tags.
26. Would you like to include some common lists used in HTML web page design?
There are many common lists used to design pages. You can select any combination of the following list types or a single list.
- List of definitions
- Menu list
- List of commands
- List of directories
- Random list
27. What is a box model?
Each element on the page is a rectangular box that can have width, height, padding, borders, and margins. Each box template section references CSS properties (width, height, padding, border, margin).
28. How to insert an image in an HTML document with different attributes?
You can use the IMG tag to insert any image into your HTML document. Use multiple attributes to better display the image. This tag does not require an end tag like other tags.
<img src=https://codeexercise.com/image1.png "alt="thecrazyprogrammer"height="25″ width="30″>>
29. What is a hyperlink?
Hyperlinks contain content linked to other URLs. Helps visitors navigate between websites or web pages within the same website. You can link to text or images on web pages.
30. What is Noresize used for?
The Noresize attribute is used in the framework. This is used to prevent users from resizing frames in HTML documents. However, frames are resized by default, and you can do this by clicking and dragging the edges of any frame.
31. What are Block Items?
These are the elements that appear on the screen from the block’s point of view. There are white spaces before and after the start and end tags, respectively. They start with a new line.
The following tags are used for block elements.
HR, ADDRESS, HEADER, OL, PRE, BLOCKQUOTE, DL
32. What is an HTML form?
If you want to collect data from your visitors, you need an HTML form. Used to collect things like names, email addresses, credit card numbers, etc. The form receives input from the visitor and saves it to a backend application such as CGI, ASP script, PHP script.
If you need to move the image to the left or right of the HTML page along with the caption text or the text around it, you should use the Float property.
33. What are online articles?
Inline elements are elements that can be displayed in any statement and do not need to be displayed in a new line. This can be done with the following tags: <em>, <ins>, <i>, <strong>, <b>, <sub>, <big>, <li>, <del>, <u>, < Dinner>
34. What are SPAN tags used for?
SPAN is used to format the elements in a SPAN block. SPAN is used to select inline text and allows users to apply different styles. It does not have its own container or zone.
35. Describes XHTML.
XHTML stands for Extensible HyperText Markup Language. It’s almost the same as HTML. It is more strict in terms of syntax than HTML. XHTML is an HTML extension that includes XML applications such as Extensible Markup Language. The main advantage of using XHTML is that it is supported by all major web browsers.
36. What is an IFRAME tag?
IFRAME tags are basically used to embed a document within an HTML document. However, the latest developments in HTML 5 have removed support for IFRAME tags and should be avoided.
37. What is a CSS selector?
CSS Selector is an equivalent alternative to HTML elements. Serves as a string that identifies the element to which the declaration applies. It can also be a series of statements. You can think of a selector as a link between an HTML document and a style sheet.
38. Describe image sprites in CSS.
When multiple images or a set of images are combined into a single image, it’s called an image sprite. We recommend using image sprites because loading each image in a web page takes longer and the page load time is faster.
39. Take advantage of built-in style sheets.
- No additional download is required from an external .css file, reducing page load time and speeding up.
- Therefore, it is possible to create several tags in the same HTML document.
- Using grouping methods and selectors styles .
40. Explain the difference between a class and an ID selector.
Classes can be bound to multiple HTML elements, but identity selectors can only be bound to a single occurrence of an element in a single HTML document.
41. Describes logical and physical tags.
Logical tags are an old concept in HTML and are mainly used for content appearance. With the advancement of physical tags, logical tags have taken a step back. Physical tags are widely used for presentation markup and are suitable for searching HTML documents.
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So this was a list of some important HTML interview questions and answers. If you find any incorrect or missing information in the list above, please let us know in the comments below.