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About the test:

The GatsbyJS Test evaluates a candidate's knowledge and skills in using GatsbyJS to building blazing websites and apps with React and GraphQL. It assesses proficiency in working with JavaScript, HTML, and CSS, as well as expertise in front-end development, and performance optimization.

Covered skills:

  • Routing and Styling in GatsbyJS
  • Performance and Scaling
  • JavaScript ES6 Basics
  • Responsive Design
  • Static Site Generation
  • Sourcing and Querying Data in GatsbyJS
  • React Fundamentals
  • HTML/ CSS Basics
  • Performance Optimization
  • JavaScript Coding

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9 reasons why
9 reasons why

Adaface GatsbyJS Assessment Test is the most accurate way to shortlist Front-end Developers



Reason #1

Tests for on-the-job skills

The GatsbyJS 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:

  • Creating and managing routes in GatsbyJS
  • Applying styles and CSS modules in GatsbyJS
  • Using GraphQL to query data in GatsbyJS
  • Optimizing performance and scalability in GatsbyJS
  • Understanding core concepts and components of React
  • Working with ES6 syntax and features in JavaScript
  • Applying HTML and CSS basics
  • Implementing responsive design principles
  • Optimizing performance in web applications
  • Generating static sites in GatsbyJS
  • Demonstrating JavaScript coding skills
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
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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 GatsbyJS Test will be non-googleable.

🧐 Question

Medium

Async Await Promises
Promises
Async-Await
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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
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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
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What will the output of the following JavaScript code be?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
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What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
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What does the following JS code output?
 image

Hard

Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State
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Review the following React code:
 image
Pick the correct statements:

A: The code renders 10 INDIAN RUPEE
B: The code renders 10 SINGAPORE DOLLAR
C: The code does not render anything and throws an error since JavaScript objects are not valid as React children
D: When the currency portion is clicked, the parent component is re-rendered
E: When the currency portion is clicked, parent component will skip the re-render because shouldComponentUpdate returns false
F: Parent component can be converted to a functional component with memoization (useMemo or memo) to avoid the re-render

Medium

Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling
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Consider a React functional component that utilizes various hooks and conditional rendering. The component is designed to fetch and display a list of items from an API, with the ability to filter the list based on user input. Here's the pseudo-code structure:
 image
In this component, which of the following is a potential issue or inefficiency?
A: The component will re-render excessively due to the `setFilter` call.
B: The `useEffect` hook will run on every render, causing performance issues.
C: The `fetchItems` function may cause a memory leak if the component unmounts during the fetch.
D: The `useMemo` hook for `filteredItems` is unnecessary and can be removed without impact.
E: The component will fail to display items when the filter is cleared.
F: There are no significant issues; the component is implemented optimally.

Medium

Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization
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Which of the following React code snippets
- triggers the reducer ‘rhymeReducer’ to update the ‘song’ value to ‘Jack and Jill’
- renders the updated ‘song’ value
- does not produce any errors/warnings
 image
 image

Hard

State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling
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Consider a React application where a custom hook `useComplexState` is defined to manage a complex state object. The application also uses the Context API to pass down the state and dispatch function. Below is the pseudo-code for the custom hook and a component using it:
 image
Given this setup, which of the following statements best describes the potential issue or challenge with `MyComponent`?
A: The component will not re-render when the global state changes.
B: The `fetchData` function will cause an infinite loop of re-renders.
C: The component will lose its state when the global state updates.
D: There will be a memory leak due to improper cleanup in `useEffect`.
E: The `dispatch` function from `useComplexState` will conflict with the global dispatch.
F: There is no issue; the component is implemented correctly.

Easy

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

Medium

Let's Hack
CSS Property
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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;
}
🧐 Question🔧 Skill

Medium

Async Await Promises
Promises
Async-Await

2 mins

JavaScript
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Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
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Medium

My Module
Scope

2 mins

JavaScript
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Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
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Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
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Hard

Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State

3 mins

React
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Medium

Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling

3 mins

React
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Medium

Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization

3 mins

React
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Hard

State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling

3 mins

React
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Easy

Background Properties

2 mins

HTML/CSS
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Easy

Colorful sentences

2 mins

HTML/CSS
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Easy

Links

2 mins

HTML/CSS
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Medium

Let's Hack
CSS Property

3 mins

HTML/CSS
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🧐 Question🔧 Skill💪 Difficulty⌛ Time
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
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Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
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My Module
Scope
JavaScript
Medium2 mins
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Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
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Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
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Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State
React
Hard3 mins
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Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling
React
Medium3 mins
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Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization
React
Medium3 mins
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State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling
React
Hard3 mins
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Background Properties
HTML/CSS
Easy2 mins
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Colorful sentences
HTML/CSS
Easy2 mins
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Links
HTML/CSS
Easy2 mins
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Let's Hack
CSS Property
HTML/CSS
Medium3 mins
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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

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment GatsbyJS 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 GatsbyJS 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
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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.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the GatsbyJS Online Test

Why you should use Pre-employment GatsbyJS Test?

The GatsbyJS 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:

  • Understanding and implementing routing in GatsbyJS
  • Styling components and pages in GatsbyJS
  • Sourcing and querying data in GatsbyJS
  • Optimizing performance and scaling in GatsbyJS
  • Understanding and utilizing React fundamentals
  • Applying JavaScript ES6 basics
  • Implementing HTML/CSS basics
  • Designing responsive web pages
  • Optimizing website performance
  • Creating static sites using GatsbyJS

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 GatsbyJS Test?

  • Routing and Styling in GatsbyJS

    This skill involves creating and managing routes in GatsbyJS, as well as implementing CSS styles for the website. It is important to measure this skill in the test to ensure candidates can effectively create dynamic and visually appealing web pages in GatsbyJS.

  • Sourcing and Querying Data in GatsbyJS

    This skill focuses on fetching and querying data from various sources, such as APIs or markdown files, in GatsbyJS. It is crucial to measure this skill to evaluate candidates' ability to access and manipulate data to create dynamic and interactive websites.

  • Performance and Scaling

    This skill deals with optimizing website performance and ensuring scalability in GatsbyJS. Candidates' proficiency in this area is essential to evaluate their ability to build efficient and fast-loading websites that can handle large amounts of traffic and data.

  • React Fundamentals

    This skill covers the fundamental concepts and principles of React, such as components, state management, and lifecycle methods. Measuring this skill is necessary to assess candidates' foundational knowledge and understanding of React, which is an integral part of GatsbyJS development.

  • JavaScript ES6 Basics

    This skill involves understanding and utilizing the modern JavaScript features and syntax introduced in ES6, such as arrow functions, spread operators, and template literals. Assessing candidates' proficiency in this skill helps determine their ability to write clean and efficient JavaScript code in GatsbyJS.

  • HTML/CSS Basics

    This skill encompasses the fundamental concepts and techniques of HTML and CSS, including markup structure, layout, and styling. It is important to measure this skill to evaluate candidates' ability to create well-structured HTML templates and apply CSS styles effectively in GatsbyJS.

  • Responsive Design

    This skill involves creating web designs that adapt and respond to different screen sizes and devices. Evaluating candidates' proficiency in responsive design is crucial to ensure they can develop websites that provide a seamless and optimal user experience across various devices in GatsbyJS.

  • Performance Optimization

    This skill focuses on optimizing the performance of GatsbyJS websites by minimizing load times, reducing resource consumption, and improving overall efficiency. Measuring this skill helps assess candidates' ability to design and implement efficient coding and optimization techniques in GatsbyJS.

  • Static Site Generation

    This skill involves utilizing GatsbyJS's static site generation capabilities to pre-render and generate static HTML files for improved performance and SEO. Evaluating candidates' proficiency in this skill helps determine their understanding and expertise in utilizing GatsbyJS's static site generation features.

  • JavaScript Coding

    This skill covers candidates' ability to write clean, maintainable, and efficient JavaScript code in GatsbyJS. Measuring this skill is essential to evaluate candidates' overall programming abilities and their capability to implement complex functionalities and logic in GatsbyJS projects.

  • 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 GatsbyJS Test to be based on.

    Routing
    Styling
    CSS Modules
    GraphQL
    Data Sourcing
    Data Querying
    Performance Optimization
    Scalability
    React Components
    React Hooks
    Props
    State
    Arrow Functions
    Destructuring
    Spread Operator
    Promise
    Async/Await
    Events
    DOM Manipulation
    HTML Tags
    CSS Selectors
    Box Model
    Media Queries
    CSS Flexbox
    CSS Grid
    Optimization Techniques
    CDN
    Compression
    Minification
    Preloading
    Caching
    Static Site Generation
    React Routing
    React Hooks
    React Context
    React Forms
    React Lifecycle Methods
    React Component Communication
    Error Handling in JavaScript
    Array Methods
    String Manipulation
    Accessing DOM Elements
    DOM Manipulation with JavaScript
    Iterators
    Generators
    Regular Expressions
    Git Basics
    Command Line Interface
    Debugging in GatsbyJS
    Responsive Images
    Mobile-First Design
    CSS Transitions
    JavaScript Testing
    Code Refactoring
    Code Structure
    Code Organization
    Code Reusability
    Error Handling in GatsbyJS
    Performance Monitoring
    Security Best Practices
    Version Control
    Webpack Configuration
    Optimizing Render Performance
    SEO Optimization
    Error Handling in React
    Code Splitting
    Progressive Web Apps
    Server-side Rendering
    State Management in React
    React Router
    Form Validation
    React Native
    Design Patterns
    Module Bundlers
    Responsive Layouts
    SEO Techniques
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What roles can I use the GatsbyJS Test for?

  • Front-end Developer
  • Web Developer
  • Full Stack Developer
  • UI/UX Designer
  • JavaScript Developer
  • React Developer
  • Web Designer
  • Front-end Engineer
  • Web Application Developer
  • Responsive Design Developer

How is the GatsbyJS 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

  • Writing JavaScript code
  • Implementing authentication and authorization in GatsbyJS
  • Using GraphQL to query and manipulate data in GatsbyJS
  • Working with Gatsby plugins for various functionalities
  • Implementing lazy loading for images and content in GatsbyJS
  • Implementing form handling and validation in GatsbyJS
  • Using CSS preprocessors (e.g., SCSS, LESS) in GatsbyJS
  • Implementing SEO optimization in GatsbyJS
  • Implementing third-party API integration in GatsbyJS
  • Troubleshooting and debugging GatsbyJS applications
  • Building and optimizing responsive design layouts

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

GatsbyJS 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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