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136 interview questions on Javascriptfor developers (2024)

Test your technical skills before an interview of Javascript with 136 corrected questions. Beginner, Intermediate or Expert level.

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136 questions
Easy
21 votes2850 runs1 comment
Easy
10 votes3359 runs
3 comments
Easy
9 votes3194 runs2 comments
Hard
9 votes2096 runs3 comments
Hard
8 votes2134 runs1 comment
Easy
7 votes3384 runs0 comment
Hard
7 votes2137 runs0 comment

Invert a string in Javascript

Front-end developer
arrays
strings
Jean-marie Cléryat Jan 4, 2022
Medium
6 votes3184 runs2 comments
Easy
6 votes3167 runs2 comments
Hard
6 votes2198 runs0 comment

What will this code display?

Front-end developer
javascript
function
identity
Jean-marie Cléryat Jan 4, 2022
Easy
6 votes2135 runs0 comment
Easy
5 votes2031 runs1 comment
Hard
5 votes1381 runs0 comment
Medium
5 votes1278 runs3 comments
Hard
5 votes232 runs1 comment