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Front End Engineer · Web Developer · Full Stack Engineer

Interview Practice Question Bank

Practice 190+ common front end interview questions across every major front end framework. Reference answers from ex-interviewers at FAANG.

JavaScript HTML CSS React

HTML Questions

40+ HTML interview questions, including quiz-style knowledge questions and HTML coding questions.

Describe the difference between `<script>`, `<script async>` and `<script defer>`
Importance
High
Quiz Topics
HTMLJAVASCRIPT
Describe the difference between a cookie, `sessionStorage` and `localStorage`.
Importance
High
Quiz Topics
HTMLJAVASCRIPT
Why is it generally a good idea to position CSS `<link>`s between `<head></head>` and JS `<script>`s just before `</body>`?
Do you know any exceptions?
Importance
High
Quiz Topics
HTMLPERFORMANCE
Describe event bubbling
Importance
High
Quiz Topics
JAVASCRIPTHTML
Explain event delegation
Importance
High
Quiz Topics
JAVASCRIPTHTML
What kind of things must you be wary of when designing or developing for multilingual sites?
Importance
Mid
Quiz Topics
HTMLINTERNATIONALIZATION
How do you serve a page with content in multiple languages?
Importance
Mid
Quiz Topics
HTMLINTERNATIONALIZATION
What are `data-` attributes good for?
Importance
Mid
Quiz Topics
HTMLTESTING
What is progressive rendering?
Importance
Mid
Quiz Topics
HTML
Why you would use a `srcset` attribute in an image tag?
Explain the process the browser uses when evaluating the content of this attribute.
Importance
Mid
Quiz Topics
HTML
Consider HTML5 as an open web platform. What are the building blocks of HTML5?
Importance
Low
Quiz Topics
HTML
What does a `DOCTYPE` do?
Importance
Low
Quiz Topics
HTML