React JS Practice Test 2025
React (also known as React.js or ReactJS) is a front-end JavaScript library for creating user interfaces or UI components that is free and open-source. Facebook and a community of individual developers and businesses maintain it. React can be used to create single-page or mobile applications as a foundation. React, on the other hand, is solely concerned with state management and rendering that information to the DOM, so constructing React apps frequently necessitates the usage of extra frameworks for routing and client-side functionality.
Candidates' knowledge of programming using the React/ReactJS library and their ability to leverage commonly used programming patterns are assessed in the React online test. It's an excellent React assessment for pre-employment screening. A proficient React developer should be able to solve problems both with the React library and with the React approach of solving problems.
Take the React Practice Test Online!
Small Learning Curve
Why should you learn React?
The most powerful frontend library for developing View parts from MVC is React. Here are some of the reasons:
All web developers are already familiar with javascript, therefore there isn't much to learn. It's not difficult to pick up. Those without a web development background or who are new to web programming must first learn javascript. Specifically the ES6 version of javascript.
Component-based architecture
Component-based architecture allows you to split down complicated applications into small, contained sections that are much easier to construct, manage, test, and debug.
Fast
React applications are quick. It renders and re-renders applications quickly and keeps track of the most recent data changes.
React is Scalable
React-based applications are faster, resulting in a better user experience. At the end of the day, the performance of your application is what makes your users happy.
React has a fantastic community
With a strong community comes a wealth of resources; there are thousands of videos, tutorials, and blog posts accessible to help you learn and construct any form of React application.
- What is React.js?
- React.js is a popular JavaScript library for building user interfaces, particularly for single-page applications. It helps in creating interactive and dynamic web pages.
- Who should learn React.js?
- React.js is ideal for developers who want to build modern, scalable web applications, especially those who are familiar with JavaScript.
- What are the responsibilities of a React developer?
- A React developer is responsible for designing and implementing web interfaces using React.js, ensuring optimal performance, and collaborating with backend developers.
- Is React.js required for web development?
- No, React.js is not mandatory, but it is highly recommended due to its popularity and the ease it provides in building interactive UIs in modern web applications.
- What is the format of the React exam?
- The React exam typically includes multiple-choice questions and coding challenges to test your knowledge of React concepts, syntax, and best practices.
- How many questions are on the React exam?
- The React exam consists of approximately 50 to 100 questions, divided into multiple sections covering React basics, advanced concepts, and coding skills.
- How long do I have to complete the React exam?
- Candidates typically have 2 to 3 hours to complete the exam, depending on the testing platform.
- Is the React exam open-book?
- No, the React exam is closed-book. You need to rely on your knowledge and understanding of React to answer the questions and solve coding challenges.
- What are the eligibility requirements for the React exam?
- To be eligible for the React exam, you need basic knowledge of HTML, CSS, and JavaScript. It’s helpful if you have prior experience with web development or have worked with JavaScript libraries.
- How do I register for the React exam?
- You can register for the React exam through various certification platforms, such as Udemy, Coursera, or directly through React-related training programs.
- How much does the React exam cost?
- The cost of the React exam varies depending on the platform and course you choose, but it generally ranges from $50 to $150.
- Can I cancel or reschedule my React exam?
- Yes, most platforms allow you to cancel or reschedule your exam, but you may need to pay a rescheduling fee or do so within a certain timeframe.
- What is the passing score for the React exam?
- The passing score for the React exam is typically around 70%, but it may vary depending on the platform and the exam level.
- How is the React exam scored?
- The React exam is scored based on correct answers and coding challenges. Points are awarded for correct answers, and challenges are graded based on efficiency and accuracy.
- How long does it take to receive React exam results?
- Results are usually available immediately after completing the exam or within a few days, depending on the platform.
- How many times can I retake the React exam?
- If you fail the exam, you can retake it, though there may be a waiting period and additional fees for each retake.
- How should I prepare for the React exam?
- Prepare by studying React concepts, practicing coding challenges, and taking online React courses. Build projects to gain hands-on experience.
- How long should I study before taking the React exam?
- Most candidates study for 1 to 3 months, depending on their existing knowledge of web development and JavaScript.
- What study materials are recommended for the React exam?
- Official React documentation, online courses, and React books are the best resources to prepare for the exam.
- Is the React exam difficult?
- The difficulty of the exam depends on your experience with React and JavaScript. For experienced developers, it should be moderately easy to pass.
Technical Skills:
ReactJS Developer Skills
‥ Strong knowledge of JavaScript, object models, DOM manipulation and event handlers, data structures, algorithms, JSX, and Babel.
‥ Complete knowledge of ReactJS and its core concepts, such as JSX, Virtual DOM, component lifecycle, and so on.
‥ Experience with ReactJS workflows such as Flux, Redux, Create React App, and data structure libraries.
‥ RESTful APIs/GraphQL, HTML/CSS, ES6 (variables and scoping, array methods), code versioning systems such as GIT, SVN, etc., popular frontend development tools, CI/CD tools, DevOps, performance testing frameworks such as Mocha, Node + NPM
‥ A bachelor's degree in computer science, information technology, or a related field is preferred.
Soft Skills:
‥ Ability to translate business needs into technological specifications
‥ Team player with an open mind who is eager to receive comments and provide suggestions.
‥ Time management, project management, communication, and interpersonal skills are all important.
‥ Ability to write clean, concise code that adheres to guidelines and best practices
‥ Willingness to learn new tools and techniques in today's world
‥ Problem-solving and troubleshooting abilities are essential.
‥ Accountability and creativity
Best React Native Books
React Developer Training
Learn React JS with these tutorials and courses, which contain both free and paid learning resources and are appropriate for beginners, intermediate learners, and experts. Here are the best React online course:
1. Learn React 16 – The Complete Guide (incl. React Router 4 & Redux) (Udemy)
2. React Certification – Full-Stack Web Development (Coursera)
3. Best React JS Course : Modern React with Redux (Udemy)
4. React Courses and Classes Online (Pluralsight)
5. The Complete React Web Developer Course (with Redux)
6. Learning React.js Training Course (Lynda – LinkedIn Learning)
7. React.js Essential Training (Lynda)
8. Advanced React and Redux Tutorial
9. Node with React Tutorial: Fullstack Web Development
10. The Complete React Native and Redux Course
1. Hands-On Design Patterns with React Native
2. React Native Cookbook - Second Edition
3.JavaScript Everywhere: Building Cross-Platform Applications with GraphQL, React, React Native, and Electron 1st Edition
4. React Native for Mobile Development
5. React Native in Action: Developing iOS and Android Apps with JavaScript
6. React and React Native - A complete hands-on guide to modern web and mobile development with React.js, 3rd Edition
Career Opportunities
Certified React Developers have a large and rising number of career opportunities. To find React developers are required in a variety of businesses and geographies. However, you will need to do more than only learn React JS abilities to be successful in your job.
The following is a list of some of the top firms where most front end developers want to work and offers jobs for react developer:
- Facebook
- Twitter
- Netflix
- Yahoo
- Dropbox
- The New York Times
React Developer Salary
React Questions and Answers
Does React certification increase salary potential?
Yes, React certification can lead to higher salaries and more job opportunities, as React is in high demand in web development.
What is the cost of taking the React exam?
The cost of the React exam typically ranges from $100 to $250, depending on the certification provider and any additional study materials offered.
What are the eligibility requirements for the React exam?
To take the React exam, candidates should have basic knowledge of JavaScript, HTML, and CSS. Prior experience with React is helpful but not mandatory.
How is the React exam scored?
The React exam is typically scored on a pass/fail basis, with a passing score usually set at 70% or higher. Some exams may provide detailed feedback on correct and incorrect answers.
How often do I need to renew my React certification?
React certifications typically do not expire, but it is recommended to stay updated with new features and best practices by taking continuing education courses or additional certifications.
How long does it take to prepare for the React exam?
Preparation time for the React exam varies, but most candidates take 2 to 3 months to study and practice React concepts, depending on their experience level.
What study materials are recommended for the React exam?
Official React documentation, online tutorials, and React-focused books are great resources. Additionally, online courses and practice exams can help reinforce learning.
What is the passing score for the React exam?
The passing score for the React exam is generally 70%, but this may vary depending on the specific exam and certification provider.
Can I take the React exam remotely?
Yes, many certification providers offer remote exams that can be taken from home using online proctoring services. Make sure your computer meets the technical requirements.
How many times can I retake the React exam if I fail?
If you fail the React exam, you can typically retake it. There may be a waiting period of a few days to weeks before retaking the exam, and an additional fee may apply.