Five Basic HTML5 Interview Questions and Their Answers 

Nowadays, everything might be digitalized and made available online, making web development essential. Tim Berners-Lee created the HyperText Markup Language (HTML), an open-source technology that is available to everyone for free.

Even decades after the internet’s inception, HTML5 is still the industry standard for building web pages. Fun fact: HTML is also utilised for creating apps for mobile devices!

HTML1.0, the original edition, had relatively little use in web development, which serves as an example of how HTML has advanced. In order to function with a variety of gadgets, including monitors, tablets, and, of course, mobile phones, the most recent version of HTML, known as HTML5, was released in 2008.

If you’re thinking about working in web technology, HTML is a necessary skill. Getting ready to address hard web development questions? The most common HTML5 interview questions are listed in this resource from JobMajesty.

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5 HTML5 Interview Questions and Their Answers :

HTML5 Interview Questions
Five Basic HTML5 Interview Questions and Their Answers  3

1. What Are the Differences Between HTML4 and HTML5?

Any web developer who wants to appreciate and utilise the technology to its utmost should be familiar with the history of HTML.

Here are some significant variations between HTML4 and HTML5:

  1. HTML5’s DOCTYPE declaration is substantially simpler compared to HTML4’s long DOCTYPE statement, which references an external resource.
  2. HTML5 included specific multimedia tags, whereas HTML4 lacked any supporting tags for multimedia.
  3. Due to HTML5’s newer version, it is unfortunate that it is not as interoperable with all web browsers as HTML4 is.

You must demonstrate your knowledge of this area to convince hiring managers that you are qualified for the job.

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2. What Does !DOCTYPE> Mean to You? Name The Different DOCTYPEs Supported By HTML5.

In response to Part A:

Every HTML5 web page begins with a brief, case-insensitive!DOCTYPE> declaration. The web browser is instructed by!DOCTYPE> to display certain information.

In response to Part B:

Because HTML5 only supports ONE DOCTYPE, <!DOCTYPE html>, it is a trick question.

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3. What Does HTML5 Web Storage Mean to You? Is it any better than cookies?

Compared to question 1 above, this is an intermediate-level question where you must demonstrate your knowledge of HTML5.

You could reply:

Prior to HTML5, cookies were used to store web data locally within browsers. Web storage has been improved by HTML5 by enabling a web page to store data in the same manner as cookies do, but more quickly and securely because the data is not sent along with every server request.

The following are the principal benefits of HTML5’s web storage over cookies:

  • Cookies never send data to the server, making them a more secure option than Web Storage.
  • The Web Storage cap for HTML5 is substantially greater than the cookie cap, ranging from 5MB to 10MB.
  • Cookies record every website visit made by a user, exposing this information to hackers because any third party can access it (such as credit card details and even passwords).

4. What Is The Importance Of Website Asset Optimization?

More “Why” questions than “What” questions may be asked during HTML5 interviews. Here’s what you could say in response:

First and foremost, optimising website assets is essential to improving a website’s Search Engine Optimization (SEO) performance, which can lead to the creation of more high-quality leads. Web development’s primary goal is to make a website that is extensively used and viewed.

The following strategies could be used to optimise website assets:

  • By using CDN
  • By compressing files
  • By Concatenating files
  • By divvying Up Assets
  • By re-organizing
  • By Code Refining

These methods seek to reduce the size of the download as well as the overall volume of HTTP requests, improving the efficiency of the web page. To be more convincing, if you can, give more examples of each strategy.

5. Why is HTML5 important to us, and what are the advantages?

Last but not least, employers could ask HTML5 interview questions that are directly relevant to the operations and objectives of the organisation.

The benefits of HTML5 include:

  • It can support more multimedia file types, including animation, drawing, audio, and video.
  • It facilitates cleaner coding.
  • It easily embeds a video on the web page
  • It has smarter web storage technologies
  • Flash is not necessary to watch videos.

Relate these benefits to the company’s activities. Whether they are enhancing their marketing strategies or tightening website security for social responsibility reasons, you must make sure that your experience would be valuable to the company’s strategy.


Actually, there are a tonne of HTML5 interview questions that you should be prepared for, so take your time to research and study.

Don’t just give a cursory response to these HTML5 interview questions; instead, elaborate on each response by including numbers, examples from your past, and references to the organisation you’re applying to. This will demonstrate your knowledge of the subject.

Pooja Sharma
Author: Pooja Sharma

Careers, development, Interview