Why you should use D3.JS Online Test?

The D3.JS 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: Data Manipulation and Binding Selecting and Modifying Elements Creating Visualizations Scaling and Axes Interactive Visualization Transitions Handling Events Layouts and Hierarchies Mapping and Projections Customization and Styling

D3.JS Online Test

About the test:

The D3.js online test uses scenario-based multiple-choice questions to evaluate a candidate's knowledge and skills related to D3.js fundamentals, data binding and manipulation, scales and axes, SVG and Canvas graphics, event handling, transitions and animations, and integrating D3.js with other web technologies. Candidates are also evaluated on their ability to write efficient and reusable code, design and implement complex visualizations, and troubleshoot and debug common issues.

Covered skills:

Data Manipulation and Binding
Creating Visualizations
Interactive Visualization
Handling Events
Mapping and Projections

Selecting and Modifying Elements
Scaling and Axes
Transitions
Layouts and Hierarchies
Customization and Styling

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9 reasons why

Adaface D3.JS Test is the most accurate way to shortlist D3.js Developers

Reason #1

Tests for on-the-job skills

The D3.JS 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 manipulate and bind data for effective visualization
Capability to select and modify elements in a D3 visualization
Proficiency in creating visualizations using D3.js library
Understanding of scaling and axes for accurate visual representation
Skill in creating interactive visualizations with user-friendly features
Knowledge of using transitions to enhance visual effects in D3.js
Adeptness in handling events for dynamic and responsive visualizations
Familiarity with layouts and hierarchies for organizing visual elements
Understanding of mapping and projections for geographic visualizations
Ability to customize and style visualizations to align with requirements

Reason #2

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

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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 D3.JS Test will be non-googleable.

🧐 Question
Medium Async Await Promises Promises Async-Await	Try practice test
What will the following code output? 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	Try practice test
Review the following JavaScript code and pick the correct options: 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	Try practice test
What will the output of the following JavaScript code be?
Medium Promise Resolve Promises Async-Await	Try practice test
What does the following code output?
Easy Throw, Try, Async Promises Async-Await	Try practice test
What does the following JS code output?
Easy Background Properties	Try practice test
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:
Easy Colorful sentences	Try practice test
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be? 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	Try practice test
In the following HTML, what will be the color of link with class "mark"
Medium Let's Hack CSS Property	Try practice test
Consider the following HTML and CSS: Which additional CSS rule(s) will render the following image? Choose ALL that apply. 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; }

	🧐 Question	🔧 Skill
	Medium Async Await Promises Promises Async-Await	2 mins JavaScript	Try practice test
What will the following code output? 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	2 mins JavaScript	Try practice test
Review the following JavaScript code and pick the correct options: 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	2 mins JavaScript	Try practice test
What will the output of the following JavaScript code be?
	Medium Promise Resolve Promises Async-Await	2 mins JavaScript	Try practice test
What does the following code output?
	Easy Throw, Try, Async Promises Async-Await	2 mins JavaScript	Try practice test
What does the following JS code output?
	Easy Background Properties	2 mins HTML/CSS	Try practice test
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:
	Easy Colorful sentences	2 mins HTML/CSS	Try practice test
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be? 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	2 mins HTML/CSS	Try practice test
In the following HTML, what will be the color of link with class "mark"
	Medium Let's Hack CSS Property	3 mins HTML/CSS	Try practice test
Consider the following HTML and CSS: Which additional CSS rule(s) will render the following image? Choose ALL that apply. 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; }

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Async Await Promises Promises Async-Await	JavaScript	Medium	2 mins	Try practice test
What will the following code output? 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
	Bitcoin prices Axios Promises	JavaScript	Medium	2 mins	Try practice test
Review the following JavaScript code and pick the correct options: 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?
	My Module Scope	JavaScript	Medium	2 mins	Try practice test
What will the output of the following JavaScript code be?
	Promise Resolve Promises Async-Await	JavaScript	Medium	2 mins	Try practice test
What does the following code output?
	Throw, Try, Async Promises Async-Await	JavaScript	Easy	2 mins	Try practice test
What does the following JS code output?
	Background Properties	HTML/CSS	Easy	2 mins	Try practice test
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:
	Colorful sentences	HTML/CSS	Easy	2 mins	Try practice test
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be? 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.
	Links	HTML/CSS	Easy	2 mins	Try practice test
In the following HTML, what will be the color of link with class "mark"
	Let's Hack CSS Property	HTML/CSS	Medium	3 mins	Try practice test
Consider the following HTML and CSS: Which additional CSS rule(s) will render the following image? Choose ALL that apply. 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; }

Reason #4

1200+ customers in 75 countries

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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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment D3.JS 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 D3.JS 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.

Reason #7

Detailed scorecards & benchmarks

View sample scorecard

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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.

Reason #9

Advanced Proctoring

Learn more

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About the D3.JS Assessment Test

Why you should use Pre-employment D3.JS Online Test?

The D3.JS 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:

Data Manipulation and Binding
Selecting and Modifying Elements
Creating Visualizations
Scaling and Axes
Interactive Visualization
Transitions
Handling Events
Layouts and Hierarchies
Mapping and Projections
Customization and Styling

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 D3.JS Online Test?

Data Manipulation and Binding
This skill involves manipulating and binding data to elements on a web page using D3.js. It allows for efficient handling of data, enabling dynamic updates and seamless integration with visualizations.
Selecting and Modifying Elements
This skill focuses on selecting and modifying elements in the DOM using D3.js. It allows for precise targeting of specific elements and enables changes to their attributes, styles, and content.
Creating Visualizations
This skill encompasses the ability to create interactive and visually appealing data visualizations using D3.js. It involves understanding how to represent data in various forms such as charts, graphs, maps, and more.
Scaling and Axes
This skill involves scaling data values to fit within a visual representation and adding axes to provide reference points for interpreting the visualized information. It ensures that the visualizations accurately reflect the underlying data.
Interactive Visualization
This skill focuses on creating interactive data visualizations that allow users to explore and interact with the displayed information. It involves incorporating interactivity features such as tooltips, hover effects, and clickable elements.
Transitions
This skill involves creating smooth and animated transitions between different states of a visualization, such as when data is updated or filtered. It enhances the user experience by providing visual cues and conveying changes in a visually appealing manner.
Handling Events
This skill involves capturing and handling various user events, such as mouse clicks, keyboard inputs, and touch gestures, to trigger specific actions or updates in the visualization. It enables user-driven interactions and enhances the overall usability of the visualization.
Layouts and Hierarchies
This skill involves utilizing predefined layouts and hierarchies in D3.js to arrange and structure visual elements in a visualization. It helps in creating organized and aesthetically pleasing representations of complex data.
Mapping and Projections
This skill focuses on mapping data to geographical or spatial representations and utilizing projections to transform the data onto different coordinate systems. It enables the creation of interactive maps and spatial visualizations.
Customization and Styling
This skill involves customizing the appearance and style of visualizations using D3.js. It includes modifying colors, fonts, sizes, and other visual aspects to align with the desired design and aesthetics.
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 D3.JS Test to be based on.
Data binding
Data manipulation
Enter,update,exit
Join
Selections
DOM manipulation
Attribute modification
Applying styles
Creating SVG elements
Drawing shapes
Text and labels
Adding tooltips
Scales
Axes
Ticks
Legend
Zooming and panning
Brushing and linking
Interactivity
Event handling
Transitions
Duration and delay
Easing
Interrupting transitions
Nested transitions
Layouts
Force layout
Tree layout
Cluster layout
Pie layout
Pack layout
Sankey diagram layout
Chord diagram layout
Dendrogram layout
Hierarchies
Treemaps
Sunbursts
Networks
GeoJSON
Map projections
TopoJSON
Geographic visualizations
Graticules
Heatmaps
Customization
Styling
Theme customization
Color schemes
Responsive design
Accessibility
Label positioning
Tooltip customization

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What roles can I use the D3.JS Online Test for?

D3.js Developer
D3.js Expert
JavaScript Developer

How is the D3.JS 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

Handling exceptions and errors
Integrating D3.js with other libraries
Understanding the DOM structure
Knowledge of JavaScript programming language
Implementing data filters and sorting
Working with JSON data
Using CSS for styling and layout
Implementing interactivity with user interactions
Working with different chart types and visual elements
Knowledge of data visualization principles
Understanding difference between SVG and canvas

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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

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D3.JS 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.