Mphasis React Js Interview Questions
React.js Interview Questions: Focus on Emphasis
Mphasis React Js Interview Questions
Mphasis React JS interview questions delve into fundamental concepts such as component lifecycle, state management, and performance optimization. These questions aid recruiters in assessing candidates' proficiency in building and maintaining dynamic, responsive web applications. By understanding the intricacies of React JS, developers can create user interfaces that enhance the user experience and provide seamless interactions.
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1 - What is the main purpose of using React JS? Building interactive user interfaces as component based applications.
2) Explain the concept of “state” in React. State is a JavaScript object that represents the mutable data of a React component. It can be updated using the `setState()` method.
3) What are the key features of hooks in React? Hooks allow for the use of state and other React features without writing class based components.
4) Describe the difference between virtual DOM and real DOM. The virtual DOM is a representation of the real DOM, which is faster to update and more efficient.
5) Explain the role of the `render()` method in React. The `render()` method returns the JSX that defines the user interface for a component.
6) What is the difference between props and state? Props (properties) are immutable data passed from parent to child components, while state is mutable data managed by a component.
7) How do you handle user events in React? User events are handled by event handlers, which are functions that are passed as props to event listeners.
8) What are the different ways to pass data between components in React? Data can be passed between components using props, state, and context.
9) How do you optimize React applications for performance? Optimizations include using memoization, avoiding unnecessary re renders, and using lazy loading.
10) What are Controlled and Uncontrolled components in React? Controlled components have their state managed by React, while uncontrolled components manage their state internally.
11 - Explain the concept of higher order components (HOCs). HOCs are functions that take a component as an argument and return a new component with additional functionality.
12) What are the advantages of using a state management library like Redux? Redux provides a predictable and centralized way to manage state in complex React applications, facilitating scalability and testability.
13) How do you handle asynchronous operations in React? Asynchronous operations can be handled using promises, async/await, or hooks like `useEffect` and `useState`.
14) What are the key considerations when designing a React application? Considerations include component reusability, data flow management, and user experience optimization.
15) What are best practices for testing React components? Testing practices include unit testing, integration testing, and end to end testing, using frameworks like Jest and React Testing Library.
How to Get More Points
1. Increase your point value by doing activities that increase your knowledge and skills. This could mean taking courses, attending workshops, or reading books.
2. Network with others in your field and build relationships with people who can help you. This will give you access to new opportunities and information.
3. Volunteer your time to causes that you care about. This will show your commitment to your community and help you meet new people who can help you advance your career.
4. Get involved in professional organizations and attend industry events. This will help you stay up to date on the latest trends and meet people who can help you get ahead.
5. Become an expert in your field and write articles, give presentations, or teach workshops. This will establish your reputation as a thought leader and help you attract new clients or employers.
6. Use your creativity and problem solving skills to come up with new solutions to challenges. This will impress your colleagues and superiors and help you move up the ladder.
7. Be a team player and help your colleagues succeed. This will build a positive reputation and make people want to work with you.
8. Always go the extra mile and do your best work. This will make your boss and coworkers notice you and appreciate your contributions.
9. Never give up on your goals. Even if you don't get the results you want right away, don't give up on trying. With perseverance, you will eventually achieve your goals.**
Course Overview
“Emphasis React JS Interview Questions” is a comprehensive course designed to empower candidates with the knowledge and skills necessary to excel in React JS interviews. It covers fundamental concepts, advanced techniques, and frequently asked interview questions, providing a solid foundation for candidates to demonstrate their proficiency in React JS and ace their interviews.
Course Description
Master React.js interview questions with this comprehensive course, covering essential concepts, advanced techniques, and commonly asked coding challenges. Learn from industry experts with hands-on exercises, mock interviews, and tailored guidance to ace your React.js job interviews.
Key Features
1 - Comprehensive Tool Coverage: Provides hands-on training with a range of industry-standard testing tools, including Selenium, JIRA, LoadRunner, and TestRail.
2) Practical Exercises: Features real-world exercises and case studies to apply tools in various testing scenarios.
3) Interactive Learning: Includes interactive sessions with industry experts for personalized feedback and guidance.
4) Detailed Tutorials: Offers extensive tutorials and documentation on tool functionalities and best practices.
5) Advanced Techniques: Covers both fundamental and advanced techniques for using testing tools effectively.
6) Data Visualization: Integrates tools for visualizing test metrics and results, enhancing data interpretation and decision-making.
7) Tool Integration: Teaches how to integrate testing tools into the software development lifecycle for streamlined workflows.
8) Project-Based Learning: Focuses on project-based learning to build practical skills and create a portfolio of completed tasks.
9) Career Support: Provides resources and support for applying learned skills to real-world job scenarios, including resume building and interview preparation.
10) Up-to-Date Content: Ensures that course materials reflect the latest industry standards and tool updates.
Benefits of taking our course
Functional Tools
Tools Used in Course: ‘mphasis React JS Interview Questions’
1 - ReactJS: Open source JavaScript library for building user interfaces.
Utilizes declarative and component based architecture.
Encourages code reusability and maintainability.
2) Redux: State management library for React applications.
Predictable and traceable state management.
Simplifies complex state handling and enhances performance.
3) Jest: Testing framework for JavaScript applications.
Enables writing fast and reliable unit, integration, and end to end tests.
Provides assertion library, mocking capabilities, and code coverage analysis.
4) Enzyme: React testing utility library.
Facilitates shallow and full rendering of components for testing.
Allows manipulation and assertion of component output and state.
5) Mocha: Test framework for Node.js applications.
Supports asynchronous and synchronous test execution.
Provides a variety of hooks and plugins for customization and reporting.
Training Program Offering for Students
- Comprehensive Curriculum: Covers fundamental React JS concepts, core features, and advanced techniques.
- Hands on Projects:* Students work on practical projects to apply their knowledge and build a portfolio.
- Expert Mentorship:* Guidance and support from experienced industry professionals.
- Job Placement Assistance:* Networking opportunities and resume preparation to facilitate job placement.
- Certification:* Upon completion, students receive an industry recognized certification to validate their skills.
- Answer questions thoroughly and accurately.* The more detailed your answers, the more points you will earn. Make sure to provide evidence from the text to support your claims.
- Be the first to answer a question.* The first person to answer a question correctly will earn the most points.
- Earn bonus points for answering difficult questions.* Questions that are more difficult to answer will earn you more points.
- Participate in discussions.* You can earn points by participating in discussions and providing helpful insights.
- Upvote other users' answers.* When you upvote an answer, the user who wrote it will earn points.
- Report spam or inappropriate content.* You can help to keep the site clean by reporting spam or inappropriate content.
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Contact Info:
Roshan Chaturvedi
Message us on Whatsapp: +91 9987184296
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