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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.

Customized Based On:

  • Experience/ difficulty level
  • Multiple skills in 1 assessment
  • Job description/ role requirements

Covered Topics:

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
See full list
Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


Human Resources Manager

Singapore Government

85%
reduction in screening time

Sample Javascript Online Test Questions

These are just a small sample from our library of 10,000+ questions. The actual questions on this JavaScript Online Test will be non-googleable.

🧐 Question🔧 Skill💪 Difficulty⌛ Time
Async Await Promises
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
Promises Async-Await
JavaScriptMedium2 min
Prototypes and Scope
What will the following code output?
 image
Prototypes
JavaScriptMedium2 min
Netflix Fav Movie
We are building a Netflix clone where users can stream movies. Our service tracks and logs usage for each user. Each log contains the name of the movie, length of the movie (in minutes) and number of minutes of the movie watched by the user. Can you help with some data analysis?
Our code needs to return the Favorite movie: the name of the movie with the highest percentage of movie watched by the user. If a user watched 30mins out of 60mins for movie1 (50%) and 75min out of 100min of movie2 (75%), the movie with the highest percentage of movie watched by the user is movie2 (Assume that the values are such that there can never be a tie for this spot).
CodingMedium40 min
Promise Resolve
What does the following code output?
 image
Promises Async-Await
JavaScriptEasy2 min
Throw, Try, Async
What does the following JS code output?
 image
Promises Async-Await
JavaScriptEasy2 min

How to use the Adaface Javascript Online Test

Start screening candidates within minutes with the ready-to-go JavaScript Online Test

1. Choose the most appropriate test for your role

2. Start inviting candidates to complete the assessment

3. Receive real time notifications and shortlist the best candidates

OR Customize the Adaface JavaScript Online Test according to your job description

1. Get a custom assessment from our library of 500+ skills within 48 hours

2. Start inviting candidates to complete the assesment

3. Receive real time notifications and shortlist the best candidates

Adaface JavaScript Online Test is trusted by enterprises worldwide

amazon
PayPal
Morgan Stanley
Adidas
SG Government
Neilsen
UCLA
Ernst and Young
Microsoft
WeWork
Bosch
Optimum Solutions
SAP
Doubtnut
Deloitte
HCL
FusionCharts
United Nations
Sokrati
Love Bonito
ZiMetrics
MTM

About the Adaface Javascript Assessment Test

Evaluate aptitude, technical and coding skills with Adaface skills assessment platform powered with an intelligent chatbot

Topics:

Types and operators
Loops
Variables
Functions
Arrays
Objects
Strings
DOM
HTML/ CSS fundamentals
Closures
IIFE
OOPs
ES6
Math
Cookies
JSON
Async/Await
Promises
Arrows
Timers
Destructuring
Local storage
Session storage
Console
this', 'call', 'bind' keywords
Event handling
Exception handling
Form handling
Service workers

Recommended Roles:

JavaScript Developer
Frontend Engineer
Backend JavaScript Developer
Full Stack Software Developer
NodeJS Developer
React Developer
Angular Developer
Software Engineer 1

Why you should use this JavaScript Online Test

JavaScript online test is designed and validated by industry experts to help tech recruiters and hiring managers to assess the JavaScript programming skills of the candidate. The JavaScript test screens the following skills that hiring managers look for in candidates:

  • JavaScript fundamentals: variables, if/else, operators, boolean logic, functions, arrays, objects, loops, strings
  • ES6: arrow functions, destructuring, spread operator, optional chaining (ES2020), etc
  • Object-oriented programming: prototypal inheritance, constructor functions (ES5), classes (ES6), encapsulation, abstraction, inheritance, and polymorphism
  • Core JavaScript concepts like 'this', 'call', 'bind', higher-order functions, closures, timers, callbacks, IIFE
  • Asynchronous JavaScript: Event loop, promises, async/await
  • JSON data from API source using AJAX
  • JavaScript in the Browser: DOM, Cookies and Events Fundamentals
  • Create dynamic HTML components like tooltips, slideshows, galleries with thumbnails
  • Debugging JavaScript using browser console and inspector
  • Experience designing cross-browser and cross-device compatible UI

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for the role. Anti-cheating features enable you to be comfortable with conducting assessments online.

How do you customize the test for Senior JavaScript developers?

The questions for Senior developers assess advanced topics like:

  • Advanced concepts such as closures, prototypal inheritance, IIFEs
  • Advanced DOM and event-driven programming
  • Understanding JavaScript works behind the scenes: engines, the call stack, hoisting, scoping, the 'this' keyword, reference values
  • Advanced functions: arrow functions, first-class and higher-order functions, bind, and closures
  • Storing data with cookies, local storage and session storage
  • Caching with Service workers
  • Networking concepts like CORS and JSONP
  • Previous class patterns: Prototype Pattern, Pseudo Classical/ Constructor Pattern
  • Pros and cons of callbacks, promises, and async/await
  • Advanced data structures like Maps, Sets
  • Garbage collection and memory management
  • Creating a custom Javascript framework or library
  • JavaScript tooling: NPM, Parcel, Babel

Additionally, the test might consist of questions assessing candidates' ability to use databases (like SQL) and frameworks (like React, Angular, Vue, and Svelte).

Distribution Of Test Scores

The actual score distribution will vary based on your candidate pipeline quality, but you should typically expect ~20% of the candidates to do well on Adaface assessments.

The score distribution for our assessments follow the normal curve. This is a good sign- standardized tests like SAT and GRE follow the normal distribution (bell curve).

Status quo assessments typically have the exact opposite of the bell curve (too many candidates getting close to 0, too many candidates getting close to 100 and too few candidates in the middle). This is typically because they focus on theoretical questions or trick questions, which are very binary in nature- either you know the trick/ theory or you don’t.

Related Tests

JavaScript & HTML/CSS Test

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~ 40 mins
Ready-to-go Test
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  • 5 HTML/CSS MCQs
  • 1 JavaScript Coding Question
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    Available
  • Request from your dashboard
  • Set up time < 48 hours
  • Set up by subject matter experts
  • JavaScript, HTML/CSS & React Test

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    ~ 50 mins
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  • JavaScript, HTML/CSS & NodeJS Test

    Time
    ~ 50 mins
    Ready-to-go Test
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  • 5 JavaScript MCQs
  • 5 HTML/CSS MCQs
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  • JavaScript, HTML/CSS & Vue Test

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    ~ 50 mins
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  • 5 JavaScript MCQs
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  • Custom Test
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  • Request from your dashboard
  • Set up time < 48 hours
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  • JavaScript, NodeJS & React Test

    Time
    ~ 50 mins
    Ready-to-go Test
    Available
  • 5 JavaScript MCQs
  • 5 NodeJS MCQs
  • 5 React MCQs
  • 1 JavaScript Coding Question
  • Custom Test
    Available
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  • Set up by subject matter experts
  • Technical Aptitude & JavaScript Test

    Time
    ~ 40 mins
    Ready-to-go Test
    Available
  • 5 Technical Aptitude MCQs
  • 5 JavaScript MCQs
  • 1 JavaScript Coding Question
  • Custom Test
    Available
  • Request from your dashboard
  • Set up time < 48 hours
  • Set up by subject matter experts
  • JQuery Test

    Time
    ~ 45 mins
    Ready-to-go Test
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    Custom Test
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  • Request from your dashboard
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  • ~ 20 MCQs
  • TypeScript Online Test

    Time
    ~ 45 mins
    Ready-to-go Test
    Available
  • 5 JavaScript MCQs
  • 5 TypeScript MCQs
  • 1 JavaScript Coding Question
  • Custom Test
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  • Request from your dashboard
  • Set up time < 48 hours
  • Set up by subject matter experts
  • How Adaface Is Different

    Adaface conversational assessments are reflective of on-the-job skills and see an 86% completion rate as compared to ~50% for traditional assessment platforms.

    OLD WAY

    TRADITIONAL TESTS

    Theoretical questions/ puzzles

    Feels like a test

    One-size-fits-all assessments

    😞
    HIRE IN
    Weeks/Months

    NEW WAY

    ADAFACE ASSESSMENTS

    Questions for on-the-job skills

    Conversational

    Customized
    assessments

    😀️
    HIRE IN
    Days

    Javascript Online Test FAQs

    Can I evaluate framework skills along with JavaScript?

    Yes. We provide ready-to-go tests where you can assess multiple relevant JavaScript skills in a single assessment. For example, our JavaScript + React + HTML/ CSS test can be used to evaluate all the JS, ReactJS, HTML, CSS and coding skills in a single assessment.

    We also provide customized assessments where we customize the assessment according to your job description.

    Can I use this test for evaluating backend JavaScript developer?

    Yes. This test is used to assess core JavaScript skills. The questions are designed to evaluate standalone JS skills without depending on HTML/ CSS. Suppose your role requires candidates to have knowledge of backend JS frameworks like NodeJS. In that case, you can look into using our JS backend developer assessment, where JS and NodeJS and coding skills are evaluated in a single test.

    Can I use this test for React Native developer?

    Yes. The assessment is focused on JS skills. You can also check the Adaface React Native assessment that evaluates React Native, JS and coding skills in a single test. You can also request a custom React Native test that will be designed as per your job description.

    What is a custom assessment?

    Every role is different and requires a custom assessment to identify top candidates efficiently. Adaface subject matter experts understand your job description/ role requirements and pick the most relevant questions from our library of 10000+ questions to create a technical assessment that helps you find the qualified candidates in your candidate pipeline quickly. All custom assessments are set up based on the job description, role requirements, must-have skills, experience level and salary range within a maximum of 48 hours and you will get an email notification once it goes live.

    Check out a sample assessment here (no credit card required).

    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.

    How is Adaface different from other assessment tools?

    We believe that status quo tech assessment platforms are not a fair way for companies to evaluate engineers because they focus on trick questions/ puzzles/ niche algorithms. We started Adaface to help companies find great engineers by assessing on-the-job skills required for a role. Read more about why we started Adaface.

    Here's what's different with Adaface:

    • High quality non-googleable questions that test for on-the-job skills as opposed to theoretical knowledge.
    • A friendly conversational assessment with a chatbot, instead of sending a "test" to a candidate. This translates to a higher completion rate. Adaface assessments (86% candidate completion rate), as opposed to traditional tests (40-50% candidate completion rate)
    • Customized assessments for 700+ skills at different experience levels.

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

    We have the following anti-cheating features in place:

    • Web proctoring
    • Webcam proctoring
    • Plagairism detection
    • Non-googleable questions
    • Secure browser

    Read more about the proctoring features.

    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.

    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.

    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.

    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.

    What is the cost of using this test?

    You can check out our pricing plans.

    Can I get a free trial?

    The platform is completely self-serve, so here's one way to proceed:

    • You can sign up for free to get a feel for how it works.
    • The free trial includes one sample assessment (Java/ JavaScript) that you will find in your dashboard when you sign up. You can use it to review the quality of questions, and the candidate experience of a conversational test on Adaface.
    • To review the quality of questions, you can also review our public questions for 50+ skills here.
    • Once you're convinced that you want to try it out with real assessments and candidates, you can pick a plan according to your requirements.

    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.

    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!


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