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About the test:

The Front-end Developer Online Test uses scenario-based MCQs to evaluate candidates on their knowledge of front-end web development, which involves creating and implementing user interfaces using HTML, CSS, and JavaScript. The test assesses candidates' proficiency in responsive design, layout and grid systems, client-side scripting, JavaScript frameworks such as React or Angular, cross-browser compatibility, and web performance optimization.

Covered skills:

  • HTML
  • JavaScript
  • UI/UX
  • Debugging
  • CSS
  • Responsive Design
  • Git
  • Performance Optimization

9 reasons why
9 reasons why

Adaface Front End Developer Test is the most accurate way to shortlist Front End Developers



Reason #1

Tests for on-the-job skills

The Front End Developer 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 create responsive designs using HTML and CSS
  • Strong understanding of JavaScript syntax and functions
  • Experience with UI/UX principles and best practices
  • Knowledge of Git version control and ability to collaborate on code
  • Proficient in debugging and troubleshooting code issues
  • Ability to optimize code for performance
  • Knowledge of HTML5 and CSS3 features
  • Familiarity with JavaScript frameworks and libraries
  • Understanding of responsive design techniques
  • Experience with cross-browser compatibility testing and debugging
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 Front End Developer Online Test will be non-googleable.

🧐 Question

Medium

Form Logs
Forms
Solve
A web app for a popular AI conference (conducted in New York, with attendees from around the world) uses a signup/login page before users can access their dashboard. The signup/login page uses a form for users to input details and submit. The details are then sent to the backend service for processing. All user actions are logged in a log server. Senior Frontend Engineer, Musk, observed patterns in the issues users are facing with the the web app. Here are the two common patterns that Musk observed in the issues that have been occurring for most users:
 image
 image
Which of the following should Musk do to enhance the user experience with the page?

A: Implement validation using JS event listeners on client-side (e.g., on input or change)
B: Utilize HTML5 built-in form validation attributes (e.g., required, pattern)
C: Use server-side validation and refresh the page on form submission
D: Use a serverless function that processes the user’s form details, saves the user’s entries in the database and responds with validation data

Medium

Interactive Application
JavaScript Rendering
Solve
A senior front-end engineer is tasked with optimizing the loading speed of a web application. The current bottleneck is the large number of JavaScript files that must be downloaded before the application becomes interactive. The engineer noticed that the browser spends a lot of time parsing and executing the JS code before making the application interactive. Which of the following techniques should the engineer apply to address this issue?

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;
}

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

Form Logs
Forms

3 mins

Frontend
Solve

Medium

Interactive Application
JavaScript Rendering

2 mins

Frontend
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

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
Form Logs
Forms
Frontend
Medium3 mins
Solve
Interactive Application
JavaScript Rendering
Frontend
Medium2 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
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
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 Front End Developer Online 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 candidate’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 Front End Developer Online 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 Front End Developer Assessment Test

Why you should use Pre-employment Front End Developer Online Test?

The Front End Developer Online 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:

  • HTML markup and structure
  • CSS styling and positioning
  • JavaScript language fundamentals
  • Responsive design principles
  • UI/UX best practices
  • Version control with Git
  • Debugging and troubleshooting
  • Performance optimization techniques
  • Advanced JavaScript concepts
  • Front-end frameworks (e.g., React, Angular)

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 Front End Developer Online Test?

  • HTML

    HTML stands for HyperText Markup Language. It is the standard markup language used to create the structure and content of web pages. HTML is essential for front-end developers as it serves as the foundation of websites and allows for the proper organization and presentation of information.

  • CSS

    CSS stands for Cascading Style Sheets. It is a style sheet language used for describing the look and formatting of a document written in HTML. CSS enables front-end developers to control the visual appearance of web pages, including layout, colors, fonts, and animations.

  • JavaScript

    JavaScript is a programming language primarily used for web development. It allows for the implementation of interactive elements, dynamic content, and advanced functionalities on websites. Measuring JavaScript skills in the test is crucial to assess a candidate's ability to create engaging and interactive user experiences.

  • Responsive Design

    Responsive design is an approach to web development that ensures web pages render well on a variety of devices and screen sizes. It involves designing and coding websites to be adaptable and provide optimal user experience, regardless of the device being used. Evaluating a candidate's understanding of responsive design is important as it reflects their ability to create user-friendly and accessible websites.

  • UI/UX

    UI (User Interface) and UX (User Experience) refer to the visual elements and overall experience of using a website or an application. Evaluating a candidate's knowledge of UI and UX principles is important as it determines their ability to design user-friendly interfaces and optimize user interactions with the product.

  • Git

    Git is a distributed version control system used for tracking changes in code during software development. It allows developers to collaborate, manage different versions of the project, and easily perform rollbacks or merges. Including Git in the test is essential as it assesses a candidate's proficiency in using a widely used and industry-standard tool for code management.

  • Debugging

    Debugging is the process of identifying and fixing errors or defects in a software program. It involves analyzing code, tracing the execution flow, and troubleshooting issues to ensure the program functions as intended. Evaluating a candidate's debugging skills is important as it demonstrates their ability to identify and resolve issues in the codebase and ensures the production of high-quality software.

  • Performance Optimization

    Performance optimization involves improving the speed, responsiveness, and efficiency of a website or application. By optimizing code, minimizing network requests, and enhancing caching strategies, front-end developers can enhance user experience and reduce load times. Including performance optimization in the assessment allows recruiters to gauge a candidate's proficiency in optimizing web assets for optimal performance.

  • 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 Front End Developer Online Test to be based on.

    HTML
    CSS
    JavaScript
    ES6
    Responsive Design
    UI/UX
    Git
    Debugging
    Performance Optimization
    HTML5
    CSS3
    Responsive Images
    Semantic HTML
    CSS Preprocessors
    Flexbox
    Grid Layout
    Transitions
    Transforms
    Animations
    Closures
    Prototype
    DOM Manipulation
    Event Handling
    AJAX
    Promises
    Asynchronous Programming
    Error Handling
    Array Methods
    Object-oriented Programming
    Design Patterns
    Code Testing
    Code Review
    Cross-browser Compatibility
    Responsive Typography
    Accessibility
    Performance Metrics
    Mobile-first Approach
    CSS Media Queries
    Responsive Frameworks
    Responsive Design Patterns
    Command Line
    Branching
    Merging
    Pull Requests
    Conflict Resolution
    Git Workflow
    Debugging Tools
    Performance Profiling
    Optimization Techniques
    Browser DevTools
    Deployment Strategies

What roles can I use the Front End Developer Online Test for?

  • Front End Developer
  • Web Developer
  • UI Developer
  • Front End Designer
  • JavaScript Developer
  • Front End Engineer
  • Web Designer
  • UI Engineer
  • UI/UX Developer

How is the Front End Developer 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

  • Unit testing (e.g., Jest, Jasmine)
  • Code refactoring and maintainability
  • Performance profiling and analysis
  • Accessibility standards and guidelines
  • Cross-browser compatibility
  • Front-end build tools (e.g., Webpack, Gulp)
  • Deployment and hosting
  • Front-end security best practices
  • Progressive Web App (PWA) development
  • API integration and JSON manipulation
  • Browser storage and caching mechanisms

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

Front End Developer 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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40 min tests.
No trick questions.
Accurate shortlisting.
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