Node.js Online Test

TestDome skill assessments are used by more than 11,000 companies and 1,030,000 test takers.

For Jobseekers

Practice your skills and earn a certificate of achievement when you score in the top 25%.

Take a Practice Test

For Companies

Test candidates with real-world problems and interview the best ones.

Sign Up to Offer this Test

About the test

The Node.js online test assesses knowledge of programming in JavaScript and the ability to solve asynchronous problems through a series of live coding tasks that are executed in the Node.js environment.

The assessment includes work-sample tasks such as:

  • Working with the Promise object and the Async-Await programming pattern.
  • Coding without blocking the Event Loop.
  • Using modules to organize code.

A good Node.js developer needs a solid understanding of JavaScript and Node.js environment in order to solve asynchronous problems on the back end.

Sample public questions

10 min
Asynchronous Calls

A company uses a Node.js application that checks several data sources for requested information. Since each request to a data source is performance heavy, the application should try to check the next source only if the request failed at the current data source. That functionality was extracted into the firstSuccessfulPromise function.

The firstSuccessfulPromise function accepts an array of Promises as a promiseArray parameter. The function should return a Promise which should resolve to the first successful result from the promiseArray.

If no Promise from the promiseArray returns successfully, the function should return undefined.

For example, if the following code is executed:

firstSuccessfulPromise([new Promise((resolve, reject) => reject()), 
              new Promise((resolve, reject) => resolve("Success!"))])
  .then(result => console.log(result));

It should print "Success!".

15 min
Asynchronous Programming

Implement the getInParallel function that should be used to invoke multiple API calls in parallel. The function accepts an array of functions that return a Promise. The function should return a Promise which should resolve to an array of results from the apiCalls argument.

For example, calling the following code should print "[ 'First API call!', 'Second API call!' ]":

let promise = getInParallel([() => Promise.resolve("First API call!"),
                             () => Promise.resolve("Second API call!")]);
if(promise) {
  promise.then((result) => console.log(result)).catch((err) => console.log(err));

For jobseekers: get certified

Earn a free certificate by achieving top 25% on the Node.js test with public questions.

Take a Certification Test

Sample silver certificate

Sunshine Caprio

Java and SQL
TestDome logo icon

For companies: premium questions

Buy TestDome to access premium questions that can't be practiced.
Get money back if you find any premium question answered online.

Sign Up to Offer this Test

12 more premium Node.js questions

Shopping Cart, Weather Data, File Exists, Run Sequentially, Retry Request, Stream Transform, Package Declaration, Add Id, Hash Bug, Game Action, Arrange Promises, Fahrenheit Converter.

Skills and topics tested

  • Node.js
  • Events
  • Asynchronous Programming
  • Modules
  • Async-Await
  • Promise
  • JSON
  • Stream
  • NPM
  • Event Loop
  • Bug Fixing
  • Event Emitter
  • Exceptions

For job roles

  • Node.js Developer

Sample candidate report

What others say

Decorative quote

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

Product reviews

G2 - Crowd Badge
G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

Used by

Solve all your skill testing needs

150+ Pre-made tests

From web development and database administration to project management and customer support. See all pre-made tests.

90+ skills

From JavaScript and SQL to English and customer support. See all questions to filter by skill.

Multi-skills Test

Mix questions for different skills or even custom questions in one test. See an example.

How TestDome works


Choose a pre-made test
or create a custom test


Invite candidates via
email, URL, or your ATS


Candidates take
a test remotely


Sort candidates and
get individual reports

Want to know more?

Related Node.js Tests: