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40 interview questionsfor developers (2025)

Test your developer skills before an interview with 40 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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40 questions
Hard
9 votes1968 runs1 comment
Hard
9 votes1960 runs1 comment

What is the `contenteditable` attribute in HTML5?

Web developer
html5
contenteditable
Jean-marie Cléryat Dec 2, 2021
Hard
9 votes1938 runs
2 comments
Easy
9 votes1907 runs1 comment

What is the selector `nav a[href^=http://]`?

Web developer
html5
selectors
Jean-marie Cléryat Dec 1, 2021
Hard
8 votes1980 runs0 comment

How to add a border to an image in HTML5

Web developer
html5
javascript
Jean-marie Cléryat Dec 2, 2021
Easy
8 votes1916 runs1 comment

How to create a navigation section in HTML5

Web developer
html
section
Jean-marie Cléryat Dec 1, 2021
Hard
7 votes1994 runs0 comment

What is the `<output>` element in HTML5?

Web developer
html5
form
Jean-marie Cléryat Dec 1, 2021
Medium
6 votes1987 runs0 comment
Hard
6 votes1978 runs1 comment
Hard
6 votes1976 runs0 comment

Write a doctype for HTML5

Web developer
html5
doctype
Jean-marie Cléryat Dec 2, 2021
Easy
6 votes1941 runs1 comment
Hard
5 votes2016 runs1 comment
Hard
5 votes2005 runs0 comment

How to select all images in HTML5 with CSS

Web developer
css
selectors
Jean-marie Cléryat Nov 29, 2021
Hard
5 votes1992 runs0 comment
Hard
5 votes1976 runs2 comments
Easy
5 votes1958 runs
2 comments

How to add a sandbox attribute to an iframe in HTML5

Web developer
iframe
sandbox
Jean-marie Cléryat Dec 1, 2021
Hard
4 votes1940 runs0 comment
Easy
4 votes1939 runs0 comment
Hard
3 votes1955 runs0 comment
Hard
3 votes1953 runs0 comment