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ReactJS DeveloperTest to assess candidates' React proficiency effectively

The ReactJS Online Test is a pre-employment screening tool designed to evaluate candidates' mastery of the React.js library and their grasp of essential React principles. This in-depth evaluation delves into applicants' ability to apply advanced React concepts to solve complex challenges, offering valuable insights into their skills and problem-solving ability. 

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Inside this ReactJS Developer Test

The ReactJS Developer Test is a pre-hiring evaluation tool that empowers hiring managers to make informed decisions regarding candidates' professional competence for roles requiring React.js proficiency. This technical assessment goes beyond surface-level knowledge, delving deep into critical aspects of React development, ensuring that potential hires are well-versed in this technology. 

This evaluation comprises diverse sub-competencies, with a strong emphasis on practical programming and a focus on JavaScript fundamentals. It includes objective questions based on JavaScript basics, including topics such as scopes and namespaces, parsing, events and event handlers, functions, forms, HTML, and links. Moreover, the assessment extensively covers ReactJS essentials, such as components, events, ReactJS functions, props, Pure Component utilisation, the render method, and state management. By comprehensively evaluating candidates across these skill clusters, the assessment offers recruiters invaluable insights, enabling them to make well-informed decisions and identify top-tier candidates primed for becoming an integral part of the in-house team. 

Key profiles assessed through the evaluation: 

• Software developer (React JS and JavaScript)   

• Junior React JS JavaScript developer   

• React JS & JavaScript application developer   

• Test composition: 19 MCQ + 1 coding question 

• Duration: 60 minutes 


What makes React.js a hot favourite among developers are its flexibility, scalability, cost-efficiency, and user-friendly interface. It uses a virtual Document Object Model (DOM), includes unidirectional data binding and a streamlined debugging process. React with its varied features is the preferred choice for front-end development by developers worldwide. 

However, organisations can only utilise the potential of React's advanced library if they have a capable 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 visualisation 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 ReactJS Developer Test comes into play, offering employers a means to identify the developer's talent. These competency-focused assessments evaluate candidates for essential skills, gauging the expertise expected from developers per industry standards.  

This test supplements the hiring process, helping employers make informed decisions while minimising 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 with considerable ease. 



ReactJS Online Assessment Competency Framework

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React JS Test Competencies Under Scanner

React JS Test


JavaScript fundamentals

This ReactJS Developer Test assesses a candidate's competency in various JavaScript subtopics, including scopes and namespaces, parsing, events and event handling, functions, forms, HTML, and links.

ReactJS concepts

This assessment also covers a candidate's grasp of fundamental ReactJS concepts, such as ReactJS components, events, ReactJS functions, props, pure components, the render method, and state.

Practical coding assessment

This React Coding Test features a hands-on coding challenge designed to evaluate a candidate's front-end web development abilities using a front-end simulator.

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

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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 an open-source JavaScript library to simplify the creation of user interfaces, especially for single-page applications. Additionally, it empowers developers to craft reusable UI components. 


React has become the prime choice for contemporary front-end developers, and honing specific skills is crucial for success in this domain. Many organisations consider React proficiency a fundamental requirement. Below is a list of essential skills that candidates should cultivate to excel in their roles: 

• Proficiency in HTML and CSS 

• Strong grasp of JavaScript fundamentals, including ES6 

• Knowledge of Redux 

• Expertise in JSX 

• Familiarity with Git 

• Competence in Node.js and npm 

The ReactJS Online Test offered by Mercer | Mettl is an assessment designed to measure a developer's skill in utilising the React JavaScript library for web application development. This test evaluates a candidate's ability to work proficiently with React concepts and functionalities. 

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