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55 interview questionsfor developers (2024)

Test your developer skills before an interview with 55 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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55 questions
Medium
34 votes1906 runs3 comments

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

Web developer
Vincent Cotroat Jan 18, 2024
Medium
21 votes1746 runs2 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
11 votes1929 runs1 comment

Fix the following Javascript loop:

Web developer
loops
conditions
Camilleat Apr 27, 2023
Easy
8 votes2459 runs1 comment

The certificate variable is not attainable outside the if loop

Web developer
variables
scope
Kahinaat Apr 6, 2022
Easy
6 votes2317 runs1 comment

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

Web developer
array
spread operator
Kahinaat Apr 6, 2022
Easy
4 votes2496 runs0 comment

What can be said about ECMAScript?

Web developer
standards
javascript
Kahinaat Apr 12, 2022
Easy
4 votes2303 runs2 comments

Write a for in loop in Javascript

Web developer
arrays
loops
Kahinaat Apr 6, 2022
Easy
4 votes2297 runs0 comment

Write a Javascript code that displays 'Adversity is not to be feared' and 'There is potentially a real danger'

Web developer
booleans
conditionals
Adrienat Mar 30, 2022
Medium
4 votes2239 runs1 comment

Print the number of countries in the array travel.

Web developer
array
for loop
Vincent Cotroat Sep 5, 2022
Easy
4 votes1709 runs1 comment

Explain the difference between let and const in Javascript

Web developer
variables
mutability
Kahinaat Mar 21, 2022
Easy
3 votes1214 runs0 comment

Find the index of the last element of an array in JavaScript

Web developer
arrays
index
Axelat Sep 4, 2023
Medium
3 votes917 runs2 comments

Access the value of the 'level' attribute in a Javascript object

Web developer
objects
arrays
Kahinaat Mar 21, 2022
Medium
3 votes455 runs0 comment

What are the advantages of using promises in Javascript?

Web developer
javascript
promises
Vincent Cotroat Nov 20, 2023
Medium
2 votes2398 runs0 comment

Write a switch statement that checks if a person can go down a slide based on their weight and height.

Web developer
switch
if else conditions
Kahinaat Apr 6, 2022
Medium
2 votes1445 runs1 comment

Create an object of type Recipe

Web developer
objects
arrays
Kahinaat Mar 29, 2022
Medium
2 votes1096 runs0 comment

What does the variable "promise" take in attribute(s)?

Web developer
promises
functions
Vincent Cotroat May 16, 2022
Medium
2 votes990 runs0 comment

Write a switch statement in Javascript that checks if a person is allowed to go down a slide.

Web developer
switch
if else conditions
Mathisat Oct 20, 2023
Easy
2 votes420 runs0 comment

Print the name and age of each professor in an array.

Web developer
array
for loop
Capucineat May 26, 2023
Hard
2 votes407 runs0 comment

What happens if we execute this code?

Web developer
Florentat Feb 29, 2024
Easy
1 vote2318 runs0 comment

Filter the elements of an array in Javascript

Web developer
array
filter
Kahinaat Apr 6, 2022