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1311 interview questionsfor Full stack developer (2025)

Test your technical skills before an interview of Full stack developer with 1311 corrected questions. Beginner, Intermediate or Expert level.

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1311 questions
Medium
93 votes3633 runs5 comments

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

Web developer
Vincent Cotroat Jan 18, 2024
Easy
38 votes3328 runs4 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
29 votes5719 runs0 comment

Write the non-JSX equivalent of the following code:

Web developer
react
jsx
Victor Sabatierat Jan 4, 2022
Easy
29 votes3443 runs2 comments

Create a form with two mandatory fields in Angular

Web developer
angular
form
validation
Anonymous authorat Jan 4, 2022
Easy
29 votes1800 runs1 comment

Explain the difference between the `include` and `require` functions in PHP.

Back-end developer
functions
errors
Vincent Cotroat Mar 24, 2023
Easy
26 votes2672 runs
11 comments

Write a Java program that prints 'welovedev'.

Full stack developer
strings
variables
Pierreat Sep 19, 2022
Easy
25 votes5708 runs1 comment

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

Web developer
props
list
Victor Sabatierat Jan 4, 2022
Easy
23 votes3452 runs
2 comments

Fix the following Javascript loop:

Web developer
loops
conditions
Camilleat Apr 27, 2023
Easy
20 votes1695 runs1 comment

What is TypeScript?

Web developer
typescript
javascript
angular
Léoat Mar 29, 2022
Easy
16 votes4470 runs
2 comments

Call a function on the first render of a React component

Web developer
react
hooks
Clément Devosat Jan 4, 2022
Easy
16 votes3406 runs
3 comments

Which provider is recommended for DOM manipulation in Angular?

Web developer
angular
dom
Anonymous authorat Jan 4, 2022
Hard
16 votes3217 runs0 comment

How many times is the condition `(a++ < 15)` evaluated in the following code? ```java int a = 3; while (a++ < 15) { if ((a++ % 5) == 0) break; } ```

Back-end developer
loops
control flow
Thomas De verdièreat Dec 16, 2021
Medium
15 votes5846 runs
2 comments

Write a React component as a function

Web developer
react
functions
state
Clément Devosat Jan 4, 2022
Easy
14 votes5778 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
14 votes3632 runs1 comment

What is the minimum PHP version for Symfony 5?

Back-end developer
php
symfony
Smaïne Millaniat Dec 3, 2021
Medium
14 votes3370 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
Medium
13 votes1279 runs
1 comment

What is the difference between an interface and an abstract class in Java?

Full stack developer
EL Mostafa Fadiliat Feb 13, 2024
Hard
12 votes3207 runs1 comment

Serialization can be customized with the Externalizable interface

Back-end developer
serialization
interface
Thomas De verdièreat Jan 4, 2022
Hard
12 votes3171 runs0 comment

A monitor in Java

Back-end developer
java
thread
Thomas De verdièreat Jan 4, 2022
Hard
12 votes3068 runs0 comment

How many instance of Integer cannot be freed from memory?

Back-end developer
array
memory
Thomas De verdièreat Dec 16, 2021
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