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JavaScript Test
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JavaScript Test

iMocha's JavaScript assessment test is the most preferred online pre-hire test for recruiters and hiring managers to objectively assess developers' JavaScript programming skills. This online JavaScript test for coding helps you build a winning tech team quickly by increasing the interview-to-selection ratio by 62% and reducing technical screening time by 80%.

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Online JavaScript Assessment Test

JavaScript, often called JS, is a programming language that helps to create and control dynamic website content. It allows users to interact with the client-side scripts, communicate asynchronously and document the content accordingly. It is also called the “assembly language of the web.” JavaScript supports event-driven, functional, and imperative programming styles.

Online JavaScript (v6) assessment test helps tech recruiters and hiring managers to assess the candidate’s JavaScript programming skills in implementing front-end logic while developing web applications. Online JavaScript test questions are designed and validated by industry experts to evaluate the programming aptitude of the JavaScript developer as per the industry standards.

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How it works

Test Summary

Online JavaScript programming test helps to screen the candidates who possess traits as follows:  

  • Ability to write reusable code in JavaScript ES6 
  • Excellent knowledge of front-end programming languages like jQuery, CSS3, HTML5 
  • Strong experience working on server-side CSS pre-processors 
  • Ability to integrate multiple data sources and databases into one system 
  • Knowledge of advanced JavaScript libraries and frameworks such as AngularJS, Knockouts, BackboneJS, ReactJS 
  • Familiarity with asynchronous request handling, partial page updates, and AJAX 
  • Work experience with handling cross-browser compatibility issues and the ability to resolve them  

Our JavaScript technical test (v6) is designed with consideration of EEOC guidelines for online candidate assessment. It will help recruiters to assess and hire diverse talent without any bias.

This JavaScript developer test may contain MCQs (Multiple Choice Questions), MAQs (Multiple Answer Questions), Fill in the Blanks, Whiteboard Questions, Audio / Video Questions, AI-LogicBox (Pseudo-Coding Platform), Coding Simulators, True or False Questions, etc.

Useful for hiring
  • JavaScript Developer/ Programmer
  • Front-End JavaScript Developer
Test Duration
No. of Questions
Level of Expertise
Topics Covered

Strings in ES6

JavaScript Online test assesses the candidate’s understanding of JavaScript strings to wrap JavaScript's string primitive data type with a few helpers' methods.

The Spread Operator

The test evaluates the knowledge of operators in JavaScript.

Parameter Values

JavaScript coding test evaluates the candidate’s knowledge of Parameter values to set default values for a function.

Object Prototype

The test gauges candidate’s understanding of objects associated with every function in JS.

Arrow Functions

The JavaScript developer test assesses applicant’s understanding of Arrow functions to create functions in a cleaner way compared to regular functions.


JavaScript assessment test evaluates candidate’s knowledge of defining constant set of values.
Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.
Question type
Multiple Option
Topics covered
Configuration Metadata


Q 1. Determine the output of the given code snippet.
const REGEX = /a/g;
REGEX.lastIndex = 2;
const match = REGEX.exec('lala');

Compile-time error
A helicopter view of the employee's progress
Test Report
You can customize this test by

Setting the difficulty level of the test

Choose easy, medium, or tricky questions from our skill libraries to assess candidates of different experience levels.

Combining multiple skills into one test

Add multiple skills in a single test to create an effective assessment and assess multiple skills together.

Adding your own
questions to the test

Add, edit, or bulk upload your coding, MCQ, and whiteboard questions.

Requesting a tailor-made test

Receive a tailored assessment created by our subject matter experts to ensure adequate screening.
What is JavaScript?
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JavaScript is a type of scripting language used to create and control dynamic website content. It means anything that moves, refreshes, or changes on your screen without requiring you to manually reload a web page. Mostly, this language can be written right in a web page’s HTML and run automatically as the page loads. JavaScript is also called as a lightweight language. JavaScript programming allow client-side script to interact with user and create dynamic pages.

Why use iMocha’s JavaScript Online test?
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iMocha's JavaScript online test is used by top tech companies to get several benefits including but not limited to:

Assess & hire job-fit candidate faster

Reduce hiring time up to 40%

Reduce 85% of candidate filtration time

Assess & map skills level of your existing employees

How do you assess the JavaScript developer skills?
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Use iMocha’s JavaScript assessment test based on MCQ questions to evaluate theoretical knowledge of the developer.

Use our JavaScript coding test to evaluate practical knowledge of developer by giving them coding challenges based on difficulty level as Low/Medium/High.

Use our live coding interview platform ,if you want to assess programming knowledge of the developer in real-time coding environment while interacting with the candidate.

What are the key skills that recruiter should look for while hiring a JavaScript developer?
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A JavaScript developer needs to develop front end logic and connect it with back-end services. You need to consider below key skills while hiring a great JavaScript developer-

Technical Skills:

  1. Knowledge of Asynchronous Programming and Functional Programming
  2. Experience in writing cross-browser code
  3. Knowledge and experience in React and Redux
  4. HTML / CSS Frameworks
  5. Experience in jQuery, Node and Express
  6. Knowledge of version control concepts

Soft Skills:

  • Leadership
  • Conflict Resolution
  • Flexibility
  • Open-mindedness
  • Problem-solving skills
  • Critical Thinking

Check out these must-have and nice-to-have JavaScript skills highlighted in this blog.

What are few interview questions that recruiter/hiring manager should ask while hiring JavaScript developer?
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Here are few important questions that you can ask to JavaScript developer to predict technical proficiency and behavioral traits:

  1. What are the different types of errors in JavaScript?
  2. How are object properties assigned?
  3. What are the important properties of an anonymous function in JavaScript?
  4. Explain the differences between one-way data flow and two-way data binding.
  5. How do you check if an object is an array or not?
  6. Explain the difference between classical inheritance and prototypal inheritance.
  7. Tell me about your last project - what worked and what didn’t?
  8. What is the hardest technical problem you have run into?
  9. Have you ever faced conflicts with your team members? How did you resolve it?
  10. What was the toughest project you worked on?

Explore our carefully chosen JavaScript interview questions to evaluate candidates' technical skills and find the right fit for your team.