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About the test:

The NextJS Test evaluates a candidate's knowledge and skills in Next.js, a popular framework for building React applications. The test assesses proficiency in Next.js concepts, client-side and server-side rendering, routing, API integration, state management, and data fetching.

Covered skills:

  • Styling and Configuring Next.JS components
  • React Hooks
  • Next.JS Routing
  • API Integration
  • Data Fetching
  • JavaScript Coding
  • React Fundamentals
  • JavaScript ES6 Fundamentals
  • Server-Side Rendering
  • State Management
  • HTML/ CSS Fundamentals

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9 reasons why
9 reasons why

Adaface NextJS Assessment Test is the most accurate way to shortlist Full Stack Developers



Reason #1

Tests for on-the-job skills

The NextJS 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:

  • Able to effectively style and configure Next.JS components
  • Proficient in React fundamentals
  • Skilled in using React Hooks
  • Strong understanding of JavaScript ES6 fundamentals
  • Knowledgeable in Next.JS routing
  • Experienced in server-side rendering with Next.JS
  • Capable of integrating APIs
  • Competent in state management
  • Proficient in data fetching
  • Solid grasp of HTML/CSS fundamentals
  • Skilled in JavaScript coding
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 NextJS 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 NextJS 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 NextJS 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

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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 NextJS Online Test

Why you should use Pre-employment NextJS Test?

The NextJS 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:

  • Styling and configuring Next.JS components
  • Understanding and applying React fundamentals
  • Utilizing React Hooks for efficient state management
  • Demonstrating proficiency in JavaScript ES6 fundamentals
  • Implementing Next.JS routing for smooth navigation
  • Applying server-side rendering techniques in Next.JS
  • Integrating APIs to fetch and display data
  • Managing state effectively in a React application
  • Fetching data from external sources
  • Building solid foundation in HTML/CSS fundamentals

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 NextJS Test?

  • Styling and Configuring Next.JS components

    This skill evaluates the ability to style and configure components in Next.js, a popular framework for building React applications. It tests knowledge of CSS-in-JS libraries, component styling methods, and how to leverage Next.js specific features for styling.

  • React Fundamentals

    This skill measures the understanding of basic React concepts and principles such as components, props, state, and lifecycle methods. It assesses the ability to build React applications and utilize commonly used React patterns.

  • React Hooks

    React Hooks are a feature introduced in React 16.8 that allows the use of state and other React features without writing class components. This skill evaluates the proficiency in using hooks like useState, useEffect, and custom hooks to manage state and side effects in a functional component.

  • JavaScript ES6 Fundamentals

    ES6 (ECMAScript 2015) is a major update to the JavaScript language that introduces new features and syntax enhancements. This skill assesses the understanding of ES6 concepts such as arrow functions, destructuring, spread syntax, modules, and more.

  • Next.JS Routing

    Next.js provides routing capabilities out of the box, allowing for easy navigation between pages. This skill evaluates the knowledge of Next.js routing mechanisms, dynamic routing, nested routes, and how to handle routing-related tasks in a Next.js application.

  • Server-Side Rendering

    Server-Side Rendering (SSR) is a technique that allows React components to be rendered on the server and sent to the client as HTML. This skill measures the ability to implement SSR using Next.js and understand the benefits and considerations of server-side rendering.

  • API Integration

    This skill evaluates the ability to integrate APIs into a Next.js application. It tests knowledge of making HTTP requests, handling API responses, authentication/authorization, and data manipulation using Next.js tools and libraries.

  • State Management

    In complex React applications, state management becomes crucial for managing the application's global state. This skill assesses the understanding of different state management approaches like Redux, Context API, and how to implement them in Next.js.

  • Data Fetching

    Fetching data from external APIs is a common task in modern web development. This skill measures the ability to fetch and consume data using various approaches, such as server-side rendering, SWR (stale-while-revalidate), and client-side data fetching with Next.js.

  • HTML/CSS Fundamentals

    This skill tests basic knowledge of HTML and CSS, including understanding of HTML tags, CSS selectors, box model, layout techniques, and responsive design principles.

  • JavaScript Coding

    This skill evaluates proficiency in JavaScript coding. It tests knowledge of JavaScript syntax, data types, control flow, loops, functions, and common coding patterns.

  • 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 NextJS Test to be based on.

    Styling Next.JS components
    Configuring Next.JS components
    React component lifecycle
    React component composition
    React state and props
    React event handling
    React conditional rendering
    React forms and form validation
    React hooks: useState
    React hooks: useEffect
    React hooks: useContext
    React hooks: useReducer
    React hooks: useCallback
    React hooks: useMemo
    React hooks: useRef
    React hooks: custom hooks
    JavaScript variables
    JavaScript data types
    JavaScript functions
    JavaScript arrays
    JavaScript objects
    JavaScript loops
    JavaScript conditional statements
    JavaScript ES6 arrow functions
    JavaScript ES6 template literals
    JavaScript ES6 destructuring
    JavaScript ES6 spread operator
    JavaScript ES6 default parameters
    JavaScript ES6 classes
    JavaScript ES6 modules
    JavaScript ES6 async/await
    Next.JS routing: page structure
    Next.JS routing: dynamic routes
    Next.JS routing: link component
    Next.JS routing: router object
    Next.JS routing: nested routes
    Next.JS server-side rendering
    Next.JS API routes
    Next.JS data fetching: getStaticProps
    Next.JS data fetching: getServerSideProps
    Next.JS data fetching: SWR
    HTML tags
    HTML attributes
    CSS selectors
    CSS box model
    CSS display property
    CSS flexbox layout
    CSS grid layout
    CSS positioning
    CSS transitions
    CSS animations
    JavaScript coding: variables
    JavaScript coding: data types
    JavaScript coding: functions
    JavaScript coding: arrays
    JavaScript coding: objects
    JavaScript coding: loops
    JavaScript coding: conditional statements
    JavaScript coding: error handling
    JavaScript coding: Promises
    JavaScript coding: async/await
    JavaScript coding: modules
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What roles can I use the NextJS Test for?

  • Full Stack Developer
  • Front-End Developer
  • Web Developer
  • JavaScript Developer
  • React Developer
  • UI/UX Developer
  • Software Engineer
  • Front-End Engineer
  • Web Application Developer
  • Junior Developer

How is the NextJS 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

  • Solving JavaScript coding challenges
  • Creating responsive and visually appealing designs
  • Optimizing performance of Next.JS components
  • Using React Context for global state management
  • Implementing pagination and lazy loading of data
  • Writing clean and maintainable code in JavaScript
  • Understanding and applying CSS frameworks and libraries
  • Handling authentication and authorization in Next.JS
  • Deploying Next.JS applications to production
  • Optimizing SEO for Next.JS applications

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

NextJS 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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