Interview questions related to react js
React JS Interview Questions and Best Practices
Interview questions related to react js
Interview questions related to React JS delve into the candidate's understanding of this popular JavaScript framework. They assess knowledge of its core concepts, such as component-based architecture, state management, and data flow. These questions help organizations gauge a candidate's ability to design and develop dynamic, interactive web applications using React JS, which is highly valued in the industry for its efficiency and ease of use.
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1 - What is React JS?
React JS is a JavaScript library for building user interfaces.
2) What are the key features of React JS?
React uses a declarative approach, virtual DOM, component based architecture, and one way data binding.
3) What is the difference between React JS and Angular JS?
React JS is a library, while Angular JS is a framework. React uses a virtual DOM, while Angular uses a real DOM. React uses one way data binding, while Angular uses two way data binding.
4) What is the Virtual DOM?
The Virtual DOM (VDOM) is a lightweight representation of the DOM that is used by React to efficiently update the UI.
5) What is the difference between a React component and a React element?
React components are reusable pieces of code that can be used to build user interfaces. React elements are immutable objects that represent a particular state of a React component.
6) What are the different types of React components?
React components can be function components, class components, and lifecycle methods.
7) What is the React state?
The React state is an object that stores data that can change over time.
8) How do you manage state in a React component?
State can be managed using the useState() hook or the component's state object.
9) What are React lifecycle methods?
React lifecycle methods are methods that are called at different stages of a component's lifecycle.
10) What is props in React?
Props are properties that are passed to a React component.
11 - What is the difference between props and state?
Props are immutable, while state can change over time.
12) What is a React key?
A React key is a unique identifier that is used to identify each item in a list or array.
13) What are some common React performance optimizations?
Some common React performance optimizations include using the shouldComponentUpdate() method, using PureComponents, and memoizing expensive calculations.
14) What are some popular React frameworks?
Some popular React frameworks include Redux, Redux Toolkit, React Router, and Material UI.
15) What are the benefits of using React JS?
React JS offers benefits such as high performance, code reusability, and a large community support.
1. Participate actively in discussions and contribute valuable insights.
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- Course Overview
- This comprehensive course delves into the array of interview questions commonly encountered for React JS positions, equipping you with the knowledge and strategies to excel in technical interviews.
- Course Description
- Master the art of acing React JS interviews with this comprehensive course. Learn the essential concepts, common interview questions, and best practices to showcase your knowledge and secure your dream job.
- 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.
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- 8) Project-Based Learning: Focuses on project-based learning to build practical skills and create a portfolio of completed tasks.
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Benefits of taking our course
Functional Tools
1 - React Developer Tools (Redux DevTools): An extension for Chrome and Firefox that allows developers to debug Redux applications by inspecting state, analyzing actions, and tracking performance.
2) React Profiler: A tool integrated into the React developer tools that helps identify performance bottlenecks by analyzing component render times, DOM updates, and React hook usage.
3) Create React App (CRA): A tool that sets up a development environment for React applications, providing a command line interface for scaffolding new projects, managing dependencies, and running development and production builds.
4) Yarn: A package manager for JavaScript applications that allows developers to install, manage, and update dependencies, including React and its related packages.
5) Babel: A transpiler that converts modern JavaScript code written with ES6+ features into code compatible with older browsers, enabling support for modern syntax in legacy environments.
6) Webpack: A bundler that transforms multiple JavaScript and CSS files into a single bundled file, making it easier to load and manage dependencies in web applications.
Effective Strategies to Increase Points:
1. Engage Regularly:
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