JavaScript Online Test

TestDome skill assessments are used by more than 4,000 companies and 450,000 individual test takers.

Companies: Try First, Pay Later

Jobseekers: Get a Certificate

Used by:

The JavaScript online test assesses candidates' knowledge of programming in the JavaScript language and its main application, Web front-end development.

It's an ideal test for pre-employment screening. A good JavaScript developer needs to be able not only to solve problems using JavaScript as the programming language but also to understand its specifics, such as prototypes, closures, event loop, and variable scope.

This online test requires candidates to solve coding problems in JavaScript and find and fix bugs in JavaScript programs.

Recommended Job Roles

JavaScript Developer

Web Front-End Developer

Sample Candidate Report

Open Sample Report

Sample Free Questions

Ensure

3min

Easy

CODE

JavaScript Language Public

Implement the ensure function so that it throws an error if called without arguments or the argument is undefined. Otherwise it should return the given value.

Solve Question

Remove Property

7min

Easy

CODE

JavaScript Language Public

Implement the removeProperty function which takes an object and property name, and does the following:

If the object obj has a property prop, the function removes the property from the object and returns true; in all other cases it returns false.

Solve Question

Date

10min

Easy

CODE

JavaScript Strings Public

Write a function that converts user entered date formatted as M/D/YYYY to a format required by an API (YYYYMMDD). The parameter "userDate" and the return value are strings.

For example, it should convert user entered date "12/31/2014" to "20141231" suitable for the API.

Solve Question

Use Free Questions On a Trial Plan

Premium Questions

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

Questions

Filter, Stopwatch, Height, Positive Numbers, Paragraph, Post Comment, Row Appender, Hobbies, Vectors, Username, Function Wrapper, Confirm, Double, Reorder, Hide Button, Truthy Expressions, Product Rating, Products, Snapshot, Table of Names, Word Count, Log Parser, Date Transform, Cards, Scale Font Size, New Folder, Log Patch, Segment, Loading Bar, Validation, Screen, A Tag, Array Search

Skills

JavaScript Arrays Closures Arithmetic Language Strings DOM manipulation Event handling Iteration Searching Exceptions Serialization Sorting Styling Monkey Patching HTML5 Bug fixing Classes ECMAScript 2015 Recursion

Score Distribution

Pricing For Premium Questions

Fully Customizable Tests

Add questions from our question library.

Create your own questions.

Customize test duration, number of questions, passing score, web proctoring, and more.

Create Free Account

Private Concierge

Send us an email with an explanation of your testing needs and a list of candidates. We will create an appropriate test, invite your candidates, review their results, and send you a detailed report.

What Others Say

Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Very smooth, well supported, great for assessing candidates

Very Prompt and helpful support when needed, we were looking to work with a third party to write and set up new tests, TestDome was able to quickly set up and support a method to do this, allowing us to start testing candidates straight away.

George Offer, Guided Solutions

Easy to use and efficient for testing developers of different levels

It provides us an opportunity to set our own timing policy, to choose from variety of questions from different areas and with difficulty gradation. Also it is great that TestDome provides free of charge tests for candidates to prepare and check how online IDE works. And support is always ready to help:)

Alexandra Bulka, WorkFusion

On the TestDome Blog

Screening Applicants: The Good, the Bad and the Ugly

Since we’re all biased and we use incorrect proxies, why not just outsource hiring to experts or recruitment agencies? After all, they’ve been screening people for many years, so they must know how to do it right?

Not really. I was surprised to discover that many experts disagree with each other. Everybody praises their pet method and criticizes the others. Many of these methods look legitimate, but are based on...