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189 interview questionsfor Web designer (2026)

Test your technical skills before an interview of Web designer with 189 corrected questions. Beginner, Intermediate or Expert level.

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189 questions
Medium
119 votes4683 runs
6 comments

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

Web developer
Anonymous authorat Jan 18, 2024
Medium
50 votes4294 runs4 comments

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

Web developer
promises
async
Anonymous authorat Mar 28, 2023
Easy
32 votes4381 runs
2 comments

Fix the following Javascript loop:

Web developer
loops
conditions
Anonymous authorat Apr 27, 2023
Easy
16 votes4776 runs
5 comments

The certificate variable is not attainable outside the if loop

Web developer
variables
scope
Anonymous authorat Apr 6, 2022
Easy
14 votes1528 runs0 comment

Which of the following utility types makes all properties of a given type optional?

Web developer
typescript
types
Anonymous authorat Mar 29, 2023
Medium
13 votes4672 runs
7 comments

Print the number of countries in the array travel.

Web developer
array
for loop
Anonymous authorat Sep 5, 2022
Easy
13 votes4568 runs
3 comments

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

Web developer
array
spread operator
Anonymous authorat Jul 19, 2024
Easy
13 votes4495 runs
1 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
Easy
13 votes1516 runs0 comment

Define a custom type that represents a coordinate with an x and y property of type number in Typescript

Web developer
typescript
type
Anonymous authorat Mar 31, 2023
Easy
12 votes4803 runs0 comment

What can be said about ECMAScript?

Web developer
standards
javascript
Anonymous authorat Apr 12, 2022
Easy
11 votes4543 runs2 comments

Write a for in loop in Javascript

Web developer
arrays
loops
Anonymous authorat Apr 6, 2022
Easy
11 votes3502 runs
1 comment

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

Web developer
arrays
index
Axelat Sep 4, 2023
Easy
11 votes1447 runs0 comment

Typescript: What is the type of result?

Web developer
typescript
type
Anonymous authorat Mar 29, 2023
Medium
11 votes1243 runs0 comment

How to filter unique values ​​from an array in Javascript?

Web developer
Raphaëlat Feb 28, 2025
Medium
10 votes4804 runs
4 comments

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
Anonymous authorat Apr 6, 2022
Easy
10 votes2503 runs0 comment

Which of the following is the **most optimized** method for creating a literal object?

Front-end developer
javascript
objects
Jean-marie Cléryat Jan 4, 2022
Hard
10 votes2483 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
Hard
10 votes2165 runs1 comment

What is the `contenteditable` attribute in HTML5?

Web developer
html5
contenteditable
Jean-marie Cléryat Dec 2, 2021
Hard
9 votes2515 runs
2 comments

Which of the following equality(s) are true? 0 == '', 'f' + 1 == 'f1'

Front-end developer
javascript
equality
Jean-marie Cléryat Jan 4, 2022
Hard
9 votes2173 runs2 comments

Which statements are true regarding the image management on this web page?

Web developer
html
images
Jean-marie Cléryat Mar 28, 2023
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