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1042 interview questionsfor Web developer (2023)

Test your technical skills before an interview of Web developer with 1042 corrected questions. Beginner, Intermediate or Expert level.

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1042 questions
Hard
15 votes979 runs2 comments

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

Web developer
Javascript
arrays
functions
Vincent Cotroat Mar 28, 2023
Easy
12 votes2116 runs1 comment

Create a form with two mandatory fields in Angular

Web developer
Angular
form
validation
Emmanuel Demeyat Jan 4, 2022
Easy
10 votes3859 runs1 comment

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

Web developer
React
props
list
Victor Sabatierat Jan 4, 2022
Easy
9 votes3848 runs0 comment

Write the non-JSX equivalent of the following code:

Web developer
React
jsx
Victor Sabatierat Jan 4, 2022
Expert
8 votes2042 runs1 comment

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

Web developer
Angular
providers
Emmanuel Demeyat Mar 28, 2023
Easy
7 votes2721 runs0 comment

Call a function on the first render of a React component

Web developer
React
hooks
Clément Devosat Jan 4, 2022
Medium
7 votes2076 runs1 comment

Which provider is recommended for DOM manipulation in Angular?

Web developer
Angular
dom
Emmanuel Demeyat Jan 4, 2022
Medium
6 votes3848 runs0 comment

Write a React component as a function

Web developer
React
functions
state
Clément Devosat Jan 4, 2022
Easy
6 votes1677 runs0 comment

The certificate variable is not attainable outside the if loop

Web developer
Javascript
variables
scope
Kahinaat Apr 6, 2022
Hard
6 votes1565 runs1 comment

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

Front-end developer
Javascript
array
for loop
Jean-marie Cléryat Nov 8, 2023
Easy
5 votes1555 runs0 comment

How to optimize a React component to improve its performance?

Web developer
React
performance
Clément Devosat Jan 4, 2022
Hard
5 votes795 runs0 comment

PHP code that throws an error.

Back-end developer
PHP
errors
Anonymous authorat Jan 4, 2022
Easy
5 votes119 runs1 comment

Import an add function from a TypeScript module math.ts

Web developer
Typescript
import
module
Lucasat May 30, 2023
Hard
4 votes2791 runs1 comment

Fix the useMemo hook in this React component.

Web developer
React
hooks
Clément Devosat Jan 4, 2022
Easy
4 votes2524 runs0 comment

Which statement(s) are true about hooks?

Web developer
React
hooks
Clément DEVOSat Jan 4, 2022
Hard
4 votes2431 runs1 comment

Write a React component that displays the number 2

Web developer
React
state
useState
Vincent Cotroat Jan 4, 2022
Easy
4 votes1830 runs0 comment

Write a React component that displays the sum of two numbers

Web developer
React
components
state
Vincent Cotroat Jan 4, 2022
Easy
4 votes1805 runs0 comment

Why is the following snippet not validated? ```jsx <h1>Products Lists</h1> <ul> <li *ngFor="let p of products" *ngIf="p.stock > 0"> {{ p.name }} </li> </ul> ``` Answer: We cannot have ngFor and ngIf on the same element

Web developer
Angular
ngFor
ngIf
Emmanuel Demeyat Jan 4, 2022
Hard
4 votes1643 runs0 comment

What will this code display?

Front-end developer
Javascript
function
identity
Jean-marie Cléryat Jan 4, 2022
Medium
4 votes1636 runs0 comment

What can we say about the following code?

Front-end developer
Javascript
variables
Jean-marie Cléryat Jan 4, 2022
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