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ReactJS Online Test: Assessing developer proficiency for effective screening

The ReactJS Test is a pre-employment screening assessment to gauge candidates' proficiency in utilizing the React.js library and their familiarity with crucial React concepts. This comprehensive assessment evaluates candidates' aptitude for applying advanced React concepts to solve complex problems, providing actionable insights into their skills and problem-solving capabilities. 

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Inside this ReactJS Online Assessment

The ReactJS Test is a comprehensive skills assessment to enable recruiting managers to make informed decisions about candidates' competence and readiness to demonstrate React.js expertise professionally. This technical evaluation goes beyond cursory knowledge, delving deep into the critical aspects of React development to ensure prospective hires possess a solid foundation.

The assessment covers a wide range of essential skills, including hands-on programming focusing on JavaScript basics. It delves further into JavaScript basics with objective questions based on scopes and namespaces, parsing, events and event handlers, functions, forms, HTML, and links. Additionally, the test goes deep into ReactJS fundamentals, such as components, events, ReactJS functions, props, Pure Component usage, the render method, and state management. By assessing test takers thoroughly across these skill areas, the assessment will help recruiters gain invaluable insights into candidates' capabilities, allowing them to make well-informed decisions and identify top-tier candidates who would make a perfect addition to the in-house team.

This React Online Test aids in screening candidates for the following roles: 

  • Software developer (React JS and JavaScript)   
  • Junior React JS JavaScript developer   
  • React JS & JavaScript application developer


ReactJS is a widely embraced open-source front-end JavaScript library for crafting compelling user interfaces in web applications. Since its launch in 2013, React has become a cornerstone in web development, renowned for its stability, scalability, and efficiency. Notable global players like Airbnb, BBC, and Meta rely on React.js for its robust capabilities.

What makes React.js a hot favorite among developers are its attributes - flexibility, scalability, cost-efficiency, and user-friendly interface creation. It boasts unidirectional data binding, a Virtual Document Object Model (DOM), and a streamlined debugging process. With its varied set of features, React is the preferred choice for front-end development by developers worldwide and is the go-to option for most Fortune 500 companies.

However, organizations can only harness the potential of React advanced library if they have a diverse and skilled team of talented ReactJS developers. These professionals should possess the technical proficiency to translate business requirements into technical specifications. The demand for proficient ReactJS developers is intense, as they are instrumental in creating intuitive data visualization tools, material design dashboards, mobile applications, and cross-platform web applications.

Employers often face the challenge of hiring the best React experts for several reasons, including competition for top talent, the need to find the right skill sets aligned with role requirements, and the complexity of making cost-effective hiring strategies. This is where the React Online Test comes into play, offering employers a means to identify the developer talent. These competency-focused assessments evaluate candidates for essential skills, gauging the expertise expected from developers with 1-3 years of React experience. The test comprises practical hands-on coding questions within a front-end simulator and multiple-choice questions based on JavaScript and ReactJS fundamentals.

This test supplements the hiring process, helping employers make informed decisions while minimizing biases. It also empowers recruiters with valuable insights into a candidate's proficiency in React.js and related fundamentals efficiently. Moreover, the reports generated are comprehensive and user-friendly, aiding recruiters in identifying the most suitable candidates for interviews. 


This React Online Test is a part of following Skills Libraries

ReactJS Online Assessment Competency Framework

Get a detailed look inside the test

React JS Test Competencies Under Scanner

React JS Test


Hands-on programming:

This React Coding Test includes a practical hands-on coding question for assessing a candidate's front-end web development skills on a front-end simulator.

JavaScript basics:

The test evaluates a candidate's strength in these JavaScript subskills: Scopes and namespaces, parsing, events and event handlers, functions, forms, HTML, and links.

ReactJS basics:

This React Online Test also evaluates the following subskills in ReactJS: ReactJS components, events, ReactJS - function, props, pure component, render method, and state.

Customize This React Assessment

Flexible customization options to suit your needs

Set difficulty level of test

Choose easy, medium or hard questions from our skill libraries to assess candidates of different experience levels.

Combine multiple skills into one test

Add multiple skills in a single test to create an effective assessment. Assess multiple skills together.

Add your own questions to the test

Add, edit or bulk upload your own coding questions, MCQ, whiteboarding questions & more.

Request a tailor-made test

Get a tailored assessment created with the help of our subject matter experts to ensure effective screening.

The Mercer | Mettl React Online Test Advantage

The Mercer | Mettl Edge
  • Industry Leading 24/7 Support
  • State of the art examination platform
  • Inbuilt Cutting Edge AI-Driven Proctoring
  • Simulators designed by developers
  • Tests Tailored to Your business needs
  • Support for 20+ Languages in 80+ Countries Globally

React JS Test Can Be Setup in 4 Steps

Step 1: Add test

Add this test your tests

Step 2: Share link

Share test link from your tests

Step 3: Test View

Candidate take the test

Step 4: Insightful Report

You get their tests report

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Frequently Asked Questions (FAQs)

React is the go-to source for front-end developers nowadays. The more you practice, the better you get at these skills, and many companies regard React as one of the essential skills. Listed below are some skills candidates should possess if they want to be successful in their respective roles: 

  • HTML + CSS  
  • JavaScript Fundamentals + ES6  
  • Redux  
  • JSX  
  • Git  
  • Node + npm  

React is an open-source JavaScript library that has made it easy to build user interfaces, particularly for single-page applications. It also allows developers to make reusable UI components. 

Mercer | Mettl's ReactJS Online Test is an assessment or evaluation to gauge a developer's proficiency in using the React JavaScript library to build web applications. The test assesses a candidate's ability to work effectively with React concepts and features. 

We offer assistance as needed. Please let us know if you have a specific request; we will gladly help. 

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