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JavaScript Online Assessment Test

🕒 Allotted Time: approx 45 mins

🧐 Questions:

  • 10 JavaScript MCQs
  • 1 Coding Question

⚙️ Customized Based On:

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

🧪 Test Options:

  • Preset test: 0 setup time
  • Customized test: < 48 hour setup time

📝 Topics:

Use it to run specific builtin objects for mathematical constants and functions

Math

Use it to generate random numbers between 0 and 1 including both

Random

Use it to get the values of variables, objects, conditions, and expressions in terms of true or false

Boolean

Use it to compare two variables with and without taking the data types into consideration

Comparison

Use it to execute specific code sections as per conditions being satisfied

Conditionals

Use it to evaluate expressions and identify matching values to a case

Switch

Use it and execute statements associated with the case

Loop For

Use it to repeatedly execute the program till the condition becomes false

Loop For In

Use it to execute the code within the for loop once

Loop For Of

Use it to execute the code within the loop a specific number of times

Loop While
See full list

Sample Adaface JavaScript Online Questions

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

How to use the Adaface JavaScript Online test

Start screening candidates within minutes with the Adaface JavaScript Online ready-to-go 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 700+ 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
Love Bonito
ZiMetrics
MTM

About the Adaface JavaScript Online Test

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

Topics:

Use it to run specific builtin objects for mathematical constants and functions

Math

Use it to generate random numbers between 0 and 1 including both

Random

Use it to get the values of variables, objects, conditions, and expressions in terms of true or false

Boolean

Use it to compare two variables with and without taking the data types into consideration

Comparison

Use it to execute specific code sections as per conditions being satisfied

Conditionals

Use it to evaluate expressions and identify matching values to a case

Switch

Use it and execute statements associated with the case

Loop For

Use it to repeatedly execute the program till the condition becomes false

Loop For In

Use it to execute the code within the for loop once

Loop For Of

Use it to execute the code within the loop a specific number of times

Loop While

Use it to create a loop that executes a specific statement as long as the condition remains true

Break

Use it to exit from a switch statement

Iterables

Use it to allow Javascript objects to define or customize their iteration behavior

Set

Use for creation of a collection of unique values

Maps

Use to iterate over an array and to call function on each and every element of array

Typeof

Use it to return the type of a variable when called

Type Conversion

Use it to convert one data type to another

Bitwise

Operands as a set of 32-bit binary digits (zeros and ones) and perform actions

RegExp

Patterns used to match character combinations in Strings

Errors

This happens when a script on a web page contains an error or fails to execute correctly

Scope

Is a policy that manages the availability of variables

Hoisting

The default behavior of moving all the declarations at the top of the scope before code execution

Strict Mode

It prevents or throws errors when relatively “unsafe” actions are taken

this Keyword

Use it to eliminate the confusion between class attributes and parameters with the same name

Arrow Function

Use it to write functions in Javascript in a concise way

Classes

Used as templates to create new objects

JSON

Used for serializing and transmitting structured data over a network connection in web applications

Debugging

Used inside the code to force stop the execution of the code at a breaking point

Style Guide

Provides a set of standards that outline how code should be written and organized

Object Definitions
Object Properties

Simple association between name and value

Object Methods

Used to store various keyed collections and more complex entities

Object Display
Object Accessors

It is a getter and setter for the fullName property

Object Constructors

This is used to create and initialize an object

Object Prototypes

Is used to provide an inheritance

Object Iterable

Is a protocol that allows JavaScript objects to define or customize their iteration behavior

Output

Use it for displaying information on the computer's screen

Statements

It is used to control the program flow in JavaScript

Syntax

It's the set of rules that define a correctly structured JavaScript program

Comments

It is used to add warnings, suggestions, and information about the code

Variables

Used to store data values that can be changed later on

Let

This allows you to declare variables that are limited to the scope of a block statement

Const

It is a declaration that creates a read-only reference to a value

Operators

It is used to compare values, perform arithmetic operations, etc

Arithmetic

Used to take numerical values as their operands and return a single numerical value

Assignment

It is used to assigning a value to a variable

Data Types
Functions

It allows you to define a block of code, give it a name and then execute it as many times as you want

Objects

It is a collection of properties, and a property is an association between a name (or key) and a value

Events

It is to provide a dynamic interface to a webpage

String

A primitive data type in JavaScript that lets you work with a series of characters

String Methods
String Search

It is used to search for a match in between regular expressions and a given string object

String Templates
Numbers

It is used to represent and manipulate numbers

Number Methods

It can be used to convert variables into numbers

Arrays

It is used to store multiple values in a single variable

Array Methods

These are actions that can be performed on objects

Array Sort

This sorts the elements of an array in place and returns the sorted array

Array Iteration
Array Const

It is a declaration that creates a read-only reference to a value

Dates

It is a single moment in time in a platform-independent format

Date Formats
Date Get Methods

It returns the day of the month (from 1 to 31) for the specified date

Date Set Methods

It is used to set the day as a number (1-31)

Object Sets

This allows the creation of collections of unique values

Object Map

It holds key-value pairs and remembers the original insertion order of the keys

Object Reference
Function Definitions

It is a set of statements that performs a task or calculates a value

Function Parameters

These are the names that are defined in the function definition

Function Invocation

It is used to execute the function code

Function Call

It is a request made by a program or script that performs a predetermined function

Function Apply

With this, you can write a method once, and then inherit it from another object

Function Closures

These are created every time a function is created, at the function creation time

Classes

These serve as templates or blueprints that help create new objects

Class Intro
Class Inheritance

It enables you to inherit all the methods and properties of another class

Class Static

These are useful for caches, fixed-configuration, or any other data you don't need to be replicated across various instances

Async

It is used to simplify the syntax necessary to consume promise-based APIs

Callbacks

These are a way to handle something after something else has been completed

Promises

These are used to handle asynchronous operations in JavaScript

Async/Await

These make it easier to write promises

BOM

Browser Object Model allows JavaScript to “interact with” the browser

Window
Screen

It holds the information of a browser screen

Location

This holds information about the current URL

History

It exposes useful methods and properties that let you navigate back and forth through the user's history

Navigator

It is used to detect the browser and gather information about it

Popup Alert

It is an alert box that ensures that the information has reached the user

Timing

It is used to measure time intervals in JavaScript

Cookies

Works as the store for information between the client-side and server-side in a web browser

Control Flow

It is the order in which a computer executes statements in a script

Error handling

It helps in handling both hardware and software errors in a sophisticated manner and helps execution to resume when interrupted

Data Models

They are used to show the data needed and created by business processes in JavaScript

DOM Manipulation
Node

It is primarily used for non-blocking, event-driven servers, due to its single-threaded nature

Functional Approach
Object-Oriented Approach

It is a way of writing code that allows you to create different objects from a common object

Prototype

Recommended Roles:

JavaScript Developer
JavaScript Programmer
Backend Developer
Frontend Developer
NodeJS Developer
React Developer
Angular Developer

About JavaScript

Why is JavaScript so popular

Simple Setup

In many other languages, you need to download the software that is compatible with the language in your machine to access all the features of the language and create a development environment. Whereas with JavaScript any individual with a web browser suddenly has a development environment right in front of them. Every browser supports JavaScript!

Event-based Programming

One of the most impressive features of JavaScript is that it includes event-based programming. It has multiple built-in events like ‘onHover’ and ‘onClick’ that wait for user interaction on a site before executing a specific segment of the code. For example, when you click the night-mode toggle, an event that triggers a JavaScript code segment that changes the CSS present across the whole website from lighter colors to darker colors.

JavaScript Frameworks and Libraries

The popularity of JavaScript led to the creation of several libraries and frameworks that have made application development efficient and performant. Today, libraries like React JS, D3.js, jQuery, etc. are used in most applications across the world. Frameworks such as Vue JS, Angular JS, and Ember JS provide optimal performance and organization to build large applications.

End-to-End Programming with Node.js

Node.JS is a runtime environment that runs JavaScript code outside of a web browser and lets the developers use JavaScript to write server-side scripting. As a result, JavaScript’s popularity was dramatically increased because Node.JS represented the idea of the “JavaScript everywhere” archetype, amalgamating all of web application development around a single programming language, rather than having a different language for client-side and server-side scripts.

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 JavaScript programming skills of the candidate. Top tech companies are using our JavaScript programming test to reduce candidate screening time by 85%.

The JavaScript test screens candidates for the following skills:

  • Ability to write reusable JavaScript code
  • Excellent knowledge of frontend programming languages and related frameworks
  • Experience integrating multiple data sources and databases
  • Knowledge of advanced libraries such as ReactJs, KnockoutJs, AngularJs, VueJs, SvelteJs
  • Familiarity with core JS concepts such as asynchronous request handling, AJAX, DOM
  • Familiarity with JS developer basics such as HTML 5, CSS 3, pre-processors
  • Experience with writing unit and functional tests
  • 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. The Javascript developer test is ideal for helping recruiters identify which candidates have the technical skills to do well on the job.

About JavaScript Developer Job Roles

JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB, and Adobe Acrobat. About 1/3rd of all developer jobs require some JavaScript knowledge.

JavaScript developers can target more platforms than any other high-level language, as JavaScript is the most popular programming language with the richest OSS module ecosystem available. It is used to create interactive web pages, user experience, and responsive front-end design. Anything a user clicks, inputs, edits, or pulls up on a website is possible. This JavaScript Online test is designed to help you find the best JavaScript engineers for your role.

Typical JavaScript Developer responsibilities may include:

  • Develop new user-facing features
  • Translation of designer mock-ups and wireframes into front-end code
  • Design and develop new front end applications for various platforms Help out with front end work on other applications (HTML/CSS/JS in Ruby applications)
  • Perform code analysis, requirements analysis, identification of code metrics, system risk analysis, and software reliability analysis
  • Collaborate with back-end developers and web designers to improve the usability
  • Optimize applications for maximum speed

The JavaScript test is designed to filter out candidates for roles like:

  • JavaScript developer
  • Junior JavaScript developer
  • Senior JavaScript developer
  • React Developer
  • Frontend Engineer

Distribution Of Test Scores

The actual score distributon 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.

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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

FAQs

What is JavaScript?

JavaScript is a scripting or programming language that allows you to implement complex features on web pages. Every time you see a web page doing more than just sitting there and displaying static information for you to look at, displaying timely content updates, animated 2D/3D graphics, interactive maps, scrolling video jukeboxes, etc., you can be sure that JavaScript is probably involved.

What type of questions will the JavaScript Online Test include?

The test is designed to enable recruiters and hiring managers to quickly identify which candidates should be invited to an interview.

This test will assess candidates on their fundamentals and depth of JavaScript development with questions on:

  • Control Flow
  • Error handling
  • Data Models
  • DOM Manipulation
  • Node
  • Functional Approach
  • Object-Oriented Approach
  • Prototype
  • Scope

The questions are designed to test for on-the-job JavaScript skills as opposed to just theoretical concepts. The programming and debugging challenges test the problem-solving and coding ability of your candidates.

What skills are required for a JavaScript role?

Depending on the role and industry, a JavaScript developer might require these skills:

  • Ability to write reusable JavaScript code
  • Excellent knowledge of frontend programming languages and related frameworks
  • Experience integrating multiple data sources and databases
  • Knowledge of advanced libraries such as ReactJs, KnockoutJs, AngularJs, VueJs, SvelteJs
  • Familiarity with core JS concepts such as asynchronous request handling, AJAX, DOM
  • Familiarity with JS developer basics such as HTML 5, CSS 3, pre-processors
  • Experience with writing unit and functional tests
  • Experience designing cross-browser and cross-device compatible UI
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 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. As in an assessment is optimizing 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 60%, 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!


Brandon Lee, Head of People, Love, Bonito

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