Search test library by skills or roles
⌘ K

JavaScript Online Test

The JavaScript test uses scenario-based MCQs to evaluate candidates on JavaScript fundamentals (ES5, ES6), ability to manipulate HTML DOM and Asynchronous programming with Ajax, Fetch API, Promises & Async / Await. The test includes coding questions to evaluate hands-on JavaScript programming skills.

Get started for free
Preview questions

Screen candidates with a 40 mins test

Test duration:  40 mins
Difficulty level:  Moderate
Availability:  Ready to use
Questions:
  • 8 JavaScript MCQs
  • 1 JavaScript Coding Question
Covered skills:
JavaScript basics (arrays; objects; strings; functions)
Structuring and styling HTML DOM
Errors and Exception Handling
Working with user data and JSON
ES6 (arrow functions; destructuring; spreads)
higher-order functions and closures
OOP (classes; constructors; prototypal inheritance)
Asynchronous JavaScript (event loop; promises; async/await)
Handling APIs
Get started for free
Preview questions

Use Adaface tests trusted by recruitment teams globally

Adaface is used by 1500+ businesses in 80 countries.

Adaface skill assessments measure on-the-job skills of candidates, providing employers with an accurate tool for screening potential hires.

Amazon Morgan Stanley Vodafone United Nations HCL PayPal Bosch WeWork Optimum Solutions Deloitte NCS Sokrati J&T Express Capegemini

Use the JavaScript Test to shortlist qualified candidates

The JavaScript Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Proficient in JavaScript basics including arrays, objects, strings, and functions
  • Knowledge of structuring and styling HTML DOM
  • Ability to handle exceptions and errors efficiently
  • Experience in working with user data and JSON
  • Familiarity with ES6 features such as arrow functions, destructuring, and spreads
  • Understanding of higher-order functions and closures
  • Competence in OOP concepts including classes, constructors, and prototypal inheritance
  • Capability to work with Asynchronous JavaScript using event loop, promises, and async/await
  • Skill in handling APIs
Get started for free
Preview questions

Screen candidates with the highest quality questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this JavaScript Online Test will be non-googleable.

🧐 Question

Medium

Async Await Promises
Promises
Async-Await
Solve
What will the following code output?
 image
A: 24 after 5 seconds and after another 5 seconds, another 24
B: 24 followed by another 24 immediately
C: 24 immediately and another 24 after 5 seconds
D: After 5 seconds, 24 and 24
E: Undefined
F: NaN
G: None of these

Medium

Bitcoin prices
Axios
Promises
Solve
Review the following JavaScript code and pick the correct options: 
 image
Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?

Medium

My Module
Scope
Solve
What will the output of the following JavaScript code be?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
Solve
What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
Solve
What does the following JS code output?
 image

Easy

Registration Queue
Logic
Queues
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Medium

Visitors Count
Strings
Logic
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Medium

Async Await Promises
Promises
Async-Await

2 mins

JavaScript
Solve

Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
Solve

Medium

My Module
Scope

2 mins

JavaScript
Solve

Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
Solve

Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
Solve
My Module
Scope
JavaScript
Medium2 mins
Solve
Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve

Test candidates on core JavaScript Hiring Test topics

JavaScript basics: JavaScript basics in this test cover arrays, objects, strings, and functions. It is important to measure this skill as a strong foundation in these concepts is crucial for writing efficient and effective JavaScript code.

Structuring and styling HTML DOM: This skill involves organizing and designing the structure of HTML elements using DOM (Document Object Model). It is measured to assess the candidate's ability to manipulate and style web page elements dynamically.

Errors and Exception Handling: Errors and exception handling refer to the ability to identify and handle errors in JavaScript code. This skill is essential to ensure smooth execution and maintenance of error-free applications, and thus, is evaluated in the test.

Working with user data and JSON: Assessing how well a candidate can interact with user data and JSON (JavaScript Object Notation) is important to gauge their ability to handle and process user input effectively and efficiently.

ES6: This skill covers advanced JavaScript concepts introduced in ECMAScript 6 (ES6), such as arrow functions, destructuring, and spreads. It is measured to evaluate a candidate's familiarity and proficiency with modern JavaScript syntax and features.

Higher-order functions and closures: Higher-order functions and closures are fundamental concepts in JavaScript that enable functional programming and code reusability. Measuring this skill helps assess a candidate's ability to write clean and maintainable code using these concepts.

OOP: This skill evaluates a candidate's understanding and implementation of Object-Oriented Programming (OOP) principles in JavaScript. It includes knowledge of classes, constructors, and prototypal inheritance, which play a crucial role in building scalable and modular applications.

Asynchronous JavaScript: Assessing a candidate's knowledge of handling asynchronous operations in JavaScript, including the event loop, promises, and async/await, is crucial to determine their ability to write responsive and efficient code that deals with time-consuming tasks.

Handling APIs: This skill measures the candidate's proficiency in consuming and integrating APIs (Application Programming Interfaces) in JavaScript. It includes knowledge of making API requests, handling responses, and parsing data, which are essential for building web applications that interact with external services and databases.

Get started for free
Preview questions

Make informed decisions with actionable reports and benchmarks

View sample scorecard

Screen candidates in 3 easy steps

Pick a test from over 500+ tests

The Adaface test library features 500+ tests to enable you to test candidates on all popular skills- everything from programming languages, software frameworks, devops, logical reasoning, abstract reasoning, critical thinking, fluid intelligence, content marketing, talent acquisition, customer service, accounting, product management, sales and more.

Invite your candidates with 2-clicks

Make informed hiring decisions

Get started for free
Preview questions

Try the most advanced candidate assessment platform

ChatGPT Protection

Non-googleable Questions

Web Proctoring

IP Proctoring

Webcam Proctoring

MCQ Questions

Coding Questions

Typing Questions

Personality Questions

Custom Questions

Ready-to-use Tests

Custom Tests

Custom Branding

Bulk Invites

Public Links

ATS Integrations

Multiple Question Sets

Custom API integrations

Role-based Access

Priority Support

GDPR Compliance


Pick a plan based on your hiring needs

The most advanced candidate screening platform.
14-day free trial. No credit card required.

From
$15
per month (paid annually)
love bonito

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, Love, Bonito

Brandon
love bonito

It's very easy to share assessments with candidates and for candidates to use. We get good feedback from candidates about completing the tests. Adaface are very responsive and friendly to deal with.

Kirsty Wood, Human Resources, WillyWeather

Brandon
love bonito

We were able to close 106 positions in a record time of 45 days! Adaface enables us to conduct aptitude and psychometric assessments seamlessly. My hiring managers have never been happier with the quality of candidates shortlisted.

Amit Kataria, CHRO, Hanu

Brandon
love bonito

We evaluated several of their competitors and found Adaface to be the most compelling. Great library of questions that are designed to test for fit rather than memorization of algorithms.

Swayam Narain, CTO, Affable

Brandon

Have questions about the JavaScript Hiring Test?

What roles can I use the JavaScript Test for?

Here are few roles for which we recommend this test:

  • JavaScript Developer
  • Front-end Developer
  • Full Stack Developer
  • Web Developer
  • UI/UX Developer
  • Web Application Developer
  • Mobile App Developer
  • Game Developer
  • Software Developer
Can I combine JavaScript Online Test with TypeScript questions?

Yes, recruiters can request a single custom test with multiple skills, including TypeScript. For more details on how we assess TypeScript skills, check out our TypeScript Online Test.

How to use JavaScript Online Test in my hiring process?

You can integrate the JavaScript Online Test as a pre-screening tool at the beginning of your recruitment process. Add a link to the test in your job post or directly invite candidates by email. This helps identify skilled candidates early in the hiring process.

What are the main Front End developer tests?

Here are some important Front End developer tests:

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

What is JavaScript Online Test?

The JavaScript Online Test is designed to assess a candidate's understanding and proficiency in JavaScript. It is used by recruiters to evaluate technical skills for roles requiring JavaScript knowledge. This test is helpful in identifying candidates who have the right skills for JavaScript-related tasks.

What topics are covered in the JavaScript Online Test?

The test covers JavaScript basics (arrays, objects, strings, functions), structuring and styling HTML DOM, errors and exception handling, working with user data and JSON, ES6 features (arrow functions, destructuring, spreads), higher-order functions and closures, OOP principles, asynchronous JavaScript, and handling APIs.

Can I test JavaScript and NodeJS together in a test?

Yes, you can test both JavaScript and NodeJS together. This is recommended to assess full-stack capabilities. Check out our combo test for more details: JavaScript & NodeJS Test.

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

What is the cost of using this test?

You can check out our pricing plans.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

customers across world
Join 1500+ companies in 80+ countries.
Try the most candidate friendly skills assessment tool today.
g2 badges
Ready to use the Adaface JavaScript Online Test?
Ready to use the Adaface JavaScript Online Test?
logo
40 min tests.
No trick questions.
Accurate shortlisting.
Terms Privacy Trust Guide
ada
Ada
● Online
Previous
Score: NA
Next
✖️