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Test Javascript - Fundamentals

Test Javascript with answers to assess your knowledge and prepare for job interviews. Assess your technical level in 20 minutes.

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Test details

Beginner

September 2024

21 minutes

4.3/5(169)

The proposed test allows you to test your skills and knowledge in the Javascript scripting programming language. It is made up of questions intended for people who have already had experience using this language, but not necessarily very advanced. It is also an opportunity to test your general knowledge in an area that is at the heart of all web development today. Here are the concepts covered:

Array methods
Variables (types, scope, declaration, mutability)
object-oriented programming
loops
The operators
Functions
Instance methods
Dot notation
Unit and functional tests
The evolutions of javascript and its link with ecmascript

This test consists of 20 questions randomly selected from a database of 56 questions in Javascript.Discover all our interview questions and answers here

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2847 points

Test author : Kahina

ETIC INSA technologies is the “junior enterprise” of INSA Lyon. It carries out expertise for companies ranging from multinational groups to very small ones in almost all domains of engineering.

Contributors32

Sample question

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

const numbers = [1, 2, 3, 4, 5];

const doubledNumbers1 = numbers.forEach((num) => {
  return num * 2;
});

const doubledNumbers2 = numbers.map((num) => {
  return num * 2;
});