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840 interview questionsfor Front-end developer (2024)

Test your technical skills before an interview of Front-end developer with 840 corrected questions. Beginner, Intermediate or Expert level.

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840 questions
Medium
70 votes2941 runs4 comments

Understanding the differences between `map()` and `forEach()` methods in JavaScript

Web developer
Vincent Cotroat Jan 18, 2024
Medium
31 votes2704 runs3 comments

Write a JavaScript function that fetches data from an API and logs it to the console.

Web developer
promises
async
Vincent Cotroat Mar 28, 2023
Easy
28 votes5296 runs0 comment

Write the non-JSX equivalent of the following code:

Web developer
react
jsx
Victor Sabatierat Jan 4, 2022
Easy
26 votes3146 runs2 comments

Create a form with two mandatory fields in Angular

Web developer
angular
form
validation
Anonymous authorat Jan 4, 2022
Easy
21 votes2851 runs1 comment

Fix the following Javascript loop:

Web developer
loops
conditions
Camilleat Apr 27, 2023
Easy
20 votes5292 runs1 comment

Write the missing code to render the children of the UserProfile component.

Web developer
props
list
Victor Sabatierat Jan 4, 2022
Easy
17 votes1459 runs1 comment

What is TypeScript?

Web developer
typescript
javascript
angular
Léoat Mar 29, 2022
Medium
14 votes5395 runs0 comment

Write a React component as a function

Web developer
react
functions
state
Clément Devosat Jan 4, 2022
Medium
13 votes3074 runs
3 comments

Which of these methods, allowing to create Providers, does not exist in Angular?

Web developer
angular
providers
Anonymous authorat Mar 28, 2023
Easy
12 votes4078 runs1 comment

Call a function on the first render of a React component

Web developer
react
hooks
Clément Devosat Jan 4, 2022
Medium
12 votes3112 runs
3 comments

Which provider is recommended for DOM manipulation in Angular?

Web developer
angular
dom
Anonymous authorat Jan 4, 2022
Easy
10 votes5350 runs1 comment

Save the state used to display the selected page in a React component.

Web developer
state
react
Clément Devosat Nov 7, 2023
Easy
10 votes3360 runs
3 comments

The certificate variable is not attainable outside the if loop

Web developer
variables
scope
Kahinaat Apr 6, 2022
Easy
10 votes1354 runs
3 comments

Specify the location in the DOM where the component of the active route will be inserted in Angular

Web developer
angular
router
Léoat Mar 29, 2022
Easy
9 votes3560 runs1 comment

UseState and useEffect in React

Web developer
state
useState
useEffect
Vincent Cotroat Jan 4, 2022
Easy
9 votes3195 runs2 comments

Use spread operator to split an array into two arrays in Javascript

Web developer
array
spread operator
Kahinaat Jul 19, 2024
Hard
9 votes2096 runs3 comments

Write a Javascript code that prints the indexes of an array.

Front-end developer
array
for loop
Jean-marie Cléryat Nov 8, 2023
Medium
9 votes256 runs0 comment

How to create a two column layout with Bootstrap?

Web developer
Maxime Javauxat Apr 19, 2024
Easy
8 votes3068 runs0 comment

Write a React component that displays the sum of two numbers

Web developer
react
components
state
Vincent Cotroat Jan 4, 2022
Medium
8 votes2965 runs
3 comments

Write a pipe to format a date according to a certain pattern.

Web developer
angular
pipe
Anonymous authorat Jan 4, 2022
Front-end developer tests