React Js Basic Interview Questions
React JS Core Concepts and Interview Basics
React Js Basic Interview Questions
React JS is a popular JavaScript library used for building user interfaces. Its core principles include the use of virtual DOM and component-based architecture, making it efficient in handling complex and dynamic applications. Its unidirectional data flow and declarative programming style simplify code maintenance, enhance performance, and foster code reusability. React's wide community support, extensive ecosystem of tools, and well-documented resources further aid in development productivity and adaptability to various project requirements.
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1 - What is React JS? A JavaScript library for building user interfaces
2) What are the benefits of using React JS? Fast, efficient, declarative, and component based
3) What is the virtual DOM? A virtual copy of the DOM, used to efficiently update the real DOM
4) What are the lifecycle methods in React JS? Methods that are called at different stages of a component's lifecycle (e.g., componentDidMount, componentWillUnmount)
5) What is state in React JS? Data that can change over time and cause the component to re render
6) How do you manage state in a React application? Using React's built in state management (useState hook) or a state management library (e.g., Redux)
7) What are props in React JS? Properties passed from a parent component to a child component
8) What is a component in React JS? A reusable, self contained code unit that represents a part of the user interface
9) What are the different types of components in React JS? Class components and functional components
10) What is the difference between a class component and a functional component? Class components are defined using ES6 classes, while functional components are defined using arrow functions
11 - What is the purpose of the render() method in a React component? To return the UI for the component
12) What is the difference between controlled and uncontrolled components in React JS? Controlled components are updated by the parent component, while uncontrolled components are updated by the user directly
13) What are hooks in React JS? Functions that allow you to add state and other features to functional components
14) What is the use of the useEffect() hook? To perform side effects (e.g., data fetching) after a component is rendered
15) What are higher order components (HOCs) in React JS? Components that accept a component as an argument and return a new component
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- Post consistently: Aim for a regular posting schedule to keep followers engaged.
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- Course Overview
- This comprehensive course covers fundamental React JS concepts and interview preparation for entry-level roles. It equips learners with in-depth knowledge of React's component architecture, state and props, event handling, and best practices.
- Course Description
- Master the fundamentals of React.js and prepare for job interviews with this comprehensive guide to essential basic interview questions. Gain a solid understanding of core React concepts, including state management, lifecycle methods, and more, and develop the skills to confidently answer common interview challenges.
- 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:
The React JS library is used to build user interfaces with reusable components and a virtual DOM (Document Object Model) for efficient rendering and updates.
2) React Router:
React Router is a client side routing library that enables the creation of single page applications (SPAs) with dynamic navigation and routing.
3) Redux:
Redux is a state management library that provides a predictable and centralized way to store and manage data in a React application.
4) Axios:
Axios is a popular HTTP request library that simplifies making requests to fetch and send data from and to servers.
5) ESLint:
ESLint is a linting tool that checks code for potential errors and violations of coding conventions to ensure code quality and consistency.
6) Webpack:
Webpack is a module bundler that optimizes and packages React applications for production by combining and minimizing code, images, and other assets.
Training Program for Students:
Introduction to React JS: Fundamentals of React, components, state, and props.
Hands on Coding Practice: Building interactive React applications step by step.
Advanced Concepts: Routing with React Router, state management with Redux.
Practical Projects: Developing real world applications using React, React Router, and Redux.
Technical Mentoring: Guidance and support from experienced React developers.
Evaluation and Certification: Assessments and certification to validate skills and knowledge gained.
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- Be active and responsive: Regularly post updates, respond to comments, and engage in discussions.
- Host events and contests:* Organize challenges, Q&A sessions, or giveaways to boost participation.
- Create original and valuable content:* Share insights, share valuable information, or host live streams to attract followers.
- Utilize social listening tools:* Monitor mentions, keywords, and trends to identify and address user needs.
- Optimize Content for Engagement:
- Use high quality visuals:* Eye catching images, videos, and infographics have higher engagement rates.
- Write compelling captions:* Craft concise, informative, and attention grabbing captions to accompany your posts.
- Use relevant hashtags:* Include trending and niche specific hashtags to increase visibility and reach.
- Consider using influencers:* Partner with influencers in your industry to promote your brand and reach a wider audience.
- Build a Strong Community:
- Respond to feedback:* Address positive and negative comments promptly and professionally.
- Foster a sense of belonging:* Create a welcoming and inclusive environment where followers feel valued.
- Celebrate milestones and achievements:* Acknowledge and appreciate your followers for their support and contributions.
- Offer exclusive perks and incentives:* Reward loyal followers with exclusive content, discounts, or recognition.
- Leverage Social Media Marketing Tools:
- Use social media scheduling tools:* Plan and schedule your posts in advance to optimize engagement.
- Conduct A/B testing:* Experiment with different content formats, posting times, and call to actions to identify what works best.
- Utilize social media analytics:* Track metrics such as reach, engagement, and conversion to evaluate your performance and make data driven decisions.
- Additional Tips:
- Collaborate with other businesses:* Partner with complementary brands or businesses to cross promote each other's content.
- Engage with your audience directly:* Reach out to followers via direct messages or comments to foster connections.
- Run paid ad campaigns:* Consider targeted social media ads to reach a wider audience and promote specific content.
- Stay updated on social media trends:* Monitor and adapt to evolving social media platforms and features to stay relevant.
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