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JavaScript & HTML/CSS Online Test

About the test:

The JavaScript HTML Online Test uses scenario-based MCQs to evaluate candidates on their understanding of JavaScript and HTML concepts, syntax, and usage. The test assesses candidates on their knowledge of JavaScript language fundamentals, such as data types, control structures, functions, and objects, as well as HTML markup, elements, attributes, and forms. It also evaluates their familiarity with JavaScript libraries and frameworks, such as jQuery, React, and Angular, and their ability to manipulate the Document Object Model (DOM) using JavaScript.

Covered skills:

  • JavaScript Basics
  • JS OOPs
  • Asynchronous Node.js and promises
  • Flexbox and Grid layouts
  • JavaScript Programming
  • JS ES6
  • Handling APIs
  • CSS Box model
  • Responsive CSS

9 reasons why
9 reasons why

Adaface JavaScript & HTML/CSS Test is the most accurate way to shortlist Front-end Developers



Reason #1

Tests for on-the-job skills

The JavaScript & HTML/CSS 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:

  • Ability to efficiently handle exceptions and errors
  • Ability to write clean and efficient JavaScript code
  • Ability to understand and use ES6 features in JavaScript
  • Ability to write Object-Oriented JavaScript code
  • Ability to handle and manipulate data from APIs
  • Ability to work with asynchronous programming in Node.js and promises
  • Ability to create responsive CSS layouts
  • Ability to understand and implement the CSS Box model
  • Ability to use Flexbox and Grid layouts in CSS
  • Ability to write CSS code for different screen sizes
  • Ability to solve JavaScript programming challenges
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
Reason #3

Non-googleable 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 10,000+ questions. The actual questions on this JavaScript & HTML/CSS Test will be non-googleable.

๐Ÿง 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 โ€˜aโ€™ 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

Background Properties
Solve
Consider the following shorthand CSS example:

background: #f7f7f7 url(jolie.jpg) no-repeat scroll 0px 0px;

Which of the following show the individual background properties represented by the shorthand:
 image

Easy

Colorful sentences
Solve
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be?
 image
A: Sentence 1 will be gray, Sentence 2 will be pink.
B: Both sentences will be gray.
C: Sentence 1 will be pink, Sentence 2 will be gray.
D: Both sentences will be pink.
E: The code does not make sense; will throw an error.

Easy

Links
Solve
In the following HTML, what will be the color of link with class "mark"
 image

Medium

Let's Hack
CSS Property
Solve
Consider the following HTML and CSS:
 image
 image
Which additional CSS rule(s) will render the following image? Choose ALL that apply.
 image
A:
div{
  flex-direction : column;
  align-items : center;
}
B:
div{
  flex-direction : row;
  align-items: center;
}
C:
div{
  flex-direction: column;
  justify-content: center;
}
D:
div{
  flex-direction: row;
  justify-content: center;
}

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.
โš ๏ธโš ๏ธโš ๏ธ 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: 
โ€˜Wโ€™ has the highest count, then โ€˜Cโ€™, then โ€˜Mโ€™. 
โš ๏ธโš ๏ธโš ๏ธ 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- โ€œMMWโ€, then the expected output is "2M1W" since there is no โ€˜Cโ€™.
- If any of them have the same count, the output should follow this order - M, W, C.
๐Ÿง Question๐Ÿ”ง 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

Background Properties

2 mins

HTML/CSS
Solve

Easy

Colorful sentences

2 mins

HTML/CSS
Solve

Easy

Links

2 mins

HTML/CSS
Solve

Medium

Let's Hack
CSS Property

3 mins

HTML/CSS
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
๐Ÿง Question๐Ÿ”ง Skill๐Ÿ’ช DifficultyโŒ› 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
Background Properties
HTML/CSS
Easy2 mins
Solve
Colorful sentences
HTML/CSS
Easy2 mins
Solve
Links
HTML/CSS
Easy2 mins
Solve
Let's Hack
CSS Property
HTML/CSS
Medium3 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

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

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment JavaScript & HTML/CSS Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidateโ€™s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the JavaScript & HTML/CSS Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

View sample scorecard
Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the JavaScript & HTML/CSS Assessment Test

Why you should use Pre-employment JavaScript & HTML/CSS Online Test?

The JavaScript & HTML/CSS Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

  • Basic syntax and functions of JavaScript
  • ES6 features and usage in JavaScript
  • Understanding and implementing Object-Oriented Programming in JavaScript
  • Interacting with APIs and handling data
  • Using Node.js for asynchronous programming and working with promises
  • Understanding and applying CSS Box model
  • Creating flexible layouts using Flexbox
  • Utilizing Grid layouts for responsive designs
  • Implementing responsive CSS for different screen sizes
  • Demonstrating strong programming skills in JavaScript

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the JavaScript & HTML/CSS Online Test?

  • JavaScript Basics

    JavaScript Basics refers to the fundamental concepts of the JavaScript programming language, such as variables, data types, operators, control flow statements, and basic syntax. This skill is measured in the test to evaluate a candidate's foundational knowledge of JavaScript, which is essential for any JavaScript developer.

  • JS ES6

    JS ES6 (ECMAScript 6) refers to the latest version of JavaScript, which introduced new features and syntax enhancements. This skill is measured in the test to assess a candidate's familiarity with modern JavaScript development practices and their ability to write clean and efficient code using ES6 features.

  • JS OOPs

    JS OOPs (Object-Oriented Programming) refers to the use of objects and classes in JavaScript to organize and structure code. This skill is measured in the test to evaluate a candidate's understanding of OOP principles and their ability to design and implement scalable and maintainable JavaScript applications.

  • Handling APIs

    Handling APIs involves making requests to external APIs (Application Programming Interfaces) and processing the responses. This skill is measured in the test to assess a candidate's ability to work with APIs, retrieve data using HTTP requests, and manipulate JSON or XML responses to extract relevant information for web applications.

  • Asynchronous Node.js and promises

    Asynchronous Node.js programming involves writing code that can handle multiple tasks simultaneously without blocking the execution. Promises are a modern JavaScript feature used for handling asynchronous operations and managing their results. This skill is measured in the test to evaluate a candidate's proficiency in writing asynchronous code using Node.js and dealing with promises for efficient and robust application development.

  • CSS Box model

    CSS Box model refers to the layout and sizing of HTML elements using properties like margin, padding, border, and content width and height. This skill is measured in the test to assess a candidate's understanding of how the box model works and their ability to manipulate element dimensions and positioning using CSS.

  • Flexbox and Grid layouts

    Flexbox and Grid are CSS layout models used to create flexible and responsive web designs. Flexbox provides a one-dimensional layout, while Grid enables two-dimensional layouts. This skill is measured in the test to evaluate a candidate's knowledge of CSS layout techniques and their ability to create and customize responsive designs using Flexbox and Grid.

  • Responsive CSS

    Responsive CSS involves creating web designs that adapt to different screen sizes and devices. This skill is measured in the test to assess a candidate's understanding of responsive design principles and their ability to use CSS media queries, fluid grids, and flexible images to ensure optimal user experience across various devices and screen resolutions.

  • JavaScript Programming

    JavaScript Programming refers to the overall coding skills and problem-solving abilities in JavaScript. This skill is measured in the test to evaluate a candidate's proficiency in writing well-structured and functional JavaScript code, their knowledge of algorithms and data structures, and their ability to solve programming challenges using JavaScript.

  • Full list of covered topics

    The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for JavaScript & HTML/CSS Test to be based on.

    JavaScript Variables
    JavaScript Data Types
    JavaScript Operators
    JavaScript Control Structures
    JavaScript Functions
    JavaScript Scope
    JavaScript Arrays
    JavaScript Objects
    JavaScript Prototypes
    JavaScript Classes
    JavaScript Closures
    JavaScript Promises
    JavaScript Async/Await
    JavaScript Fetch API
    JavaScript DOM Manipulation
    JavaScript Event Handling
    JavaScript Regular Expressions
    JavaScript Error Handling
    ES6 Arrow Functions
    ES6 Template Literals
    ES6 Destructuring
    ES6 Rest and Spread Operators
    ES6 Modules
    ES6 Classes
    ES6 Promises
    ES6 Async/Await
    ES6 Generators
    ES6 Maps
    ES6 Sets
    OOPs Concepts in JavaScript
    Inheritance in JavaScript
    Encapsulation in JavaScript
    Polymorphism in JavaScript
    Handling APIs with JavaScript
    Consuming JSON APIs
    Making HTTP Requests
    Async JavaScript with APIs
    Node.js Event Loop
    Callback Functions in Node.js
    Promises in Node.js
    Async/Await in Node.js
    CSS Box Model
    CSS Display Property
    CSS Positioning
    CSS Float
    CSS Flexbox
    CSS Grid
    CSS Media Queries
    Responsive Web Design
    JavaScript Programming Challenges
    Algorithms
    Data Structures
    Recursion
    Sorting Techniques
    Search Algorithms
    Efficiency and Optimization

What roles can I use the JavaScript & HTML/CSS Online Test for?

  • Front-end Developer
  • Web Developer
  • Full Stack Developer
  • JavaScript Developer
  • HTML/CSS Developer

How is the JavaScript & HTML/CSS Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

  • Advanced JavaScript concepts like closures and prototypes
  • Optimizing JavaScript code for performance
  • Debugging and troubleshooting JavaScript errors
  • Creating interactive user interfaces with JavaScript
  • Using JavaScript to manipulate and validate forms
  • Working with JSON data in JavaScript
  • Implementing and understanding DOM manipulation
  • Building and deploying JavaScript applications
  • Using CSS preprocessors like Sass or Less
  • Implementing animations and transitions with CSS
  • Knowledge of accessibility and responsive design principles

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

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.


85%
reduction in screening time

JavaScript & HTML/CSS Hiring Test FAQs

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.

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.

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?

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

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.

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