React Js Interview Questions 2019

React Js Interview Questions 2019

React JS Interview Questions: Latest Trends and Preparation Guide for 2019

React Js Interview Questions 2019

React JS, a popular JavaScript library for building user interfaces, has emerged as a key skill for frontend developers in 2019. Interview questions pertaining to React JS assess candidates' understanding of component-based architecture, state management, and performance optimization techniques, crucial for creating efficient and scalable web applications.

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1 - What is the difference between state and props in React?

2) Explain the lifecycle of a React component.

3) What is virtual DOM and how does it work?

4) What are the benefits of using React Hooks?

5) How do you handle API calls in a React application?

6) What is Redux and how is it used for state management in React?

7) Explain the difference between controlled and uncontrolled components.

8) How do you create custom React hooks?

9) What is the use of fragments in React?

10) How do you handle errors in React applications?

11 - What are the best practices for styling React components?

12) Explain the concept of React Context and how it is used.

13) What is the difference between React Router and react router dom?

14) How do you optimize the performance of a React application?

15) What is the future of React and what are the upcoming trends to watch out for?

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• Course Overview
• This course provides a comprehensive overview of React JS interview questions commonly asked in 2019, covering fundamental concepts, component lifecycle, state management, props, hooks, and best practices for React development.
• Course Description
• This course prepares candidates for React JS interviews with comprehensive coverage of the latest and most frequently asked questions. It comprehensively covers key concepts, including useState(), useEffect(), and Redux, enabling candidates to demonstrate a deep understanding of React's core principles and practical implementation.
• 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

1 - React JS: A JavaScript library used to build user interfaces for web and mobile applications. It allows for efficient creation and rendering of dynamic and interactive UI components.

2) Node.js: A JavaScript runtime environment that allows for the execution of JavaScript code outside of a web browser. It is used for developing server side applications, web applications, and command line tools.

3) Express.js: A Node.js framework for developing web applications. It provides a simple and robust API for routing, handling HTTP requests, and other tasks commonly required in web development.

4) MongoDB: A NoSQL database that stores data in a document oriented format. It offers flexibility and scalability for storing and managing data in applications.

5) GraphQL: A query language for APIs that allows for efficient and customizable data fetching. It simplifies data retrieval by enabling clients to specify exactly the data they need.

6) Jest: A JavaScript testing framework used for writing tests for React applications. It provides a comprehensive set of features for testing components, utilities, and other parts of an application.

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