This repository is designed to enhance your JavaScript proficiency and prepare you effectively for job interviews.
- Basic JavaScript 🌟
- Intermediate JavaScript 🚀
- Advanced JavaScript 🔥
- ES6 and Modern JavaScript ⚡
- DOM and Web API 🌐
- Testing and Debugging 🛠️
- Package Managers and Build Tools 🧰
- Security and Best Practices 🔐
- Performance Optimization 🚀
- APIs and Asynchronous Programming 🌐
- JavaScript Patterns and Best Practices 🛠️
- Beginner ReactJS ⚛️
- Intermediate ReactJS ⚛️ 🚀
- Advanced ReactJS ⚛️ 🔥
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- How does lazy loading of scripts enhance web page performance?
- What is the Event Loop and how does it work in JavaScript?
- Describe the purpose of Service Workers in web development.
- How can you achieve immutability in JavaScript objects and arrays?
- What are the differences between "call," "apply," and "bind" in JavaScript?
- Explain the concept of a pure function and its benefits.
- What are WebAssembly and its use cases in JavaScript applications?
- Explain the concept of BigInt and its purpose in JavaScript.
- What are decorators in JavaScript, and how can they be used?
- How does memoization improve the performance of recursive functions?
- What is the Event Emitters pattern, and how can it be used in JavaScript?
- Describe the purpose of the Proxy object and its use cases in JavaScript.
- How does the JavaScript runtime environment differ from the browser environment?
- What is the Event Loop in Node.js, and how does it differ from the browser's Event Loop?
- Explain the concept of microservices and their role in modern web development.
- What are Web Components, and how can they be used in JavaScript applications.
- What are arrow functions in ES6, and how do they differ from regular functions?
- Explain the concept of template literals in ES6.
- What are destructuring assignments in ES6?
- How does the "class" keyword work in ES6 for object-oriented programming?
- What are "promises" in ES6, and how do they differ from callbacks?
- Explain the use of the "async/await" feature in ES6.
- What is the purpose of the "let" and "const" keywords in ES6?
- How can you import and export modules in ES6?
- Describe the "Map" and "Set" data structures in ES6.
- What is the "spread" operator in ES6, and how does it work.
- How do you create an element in the DOM using JavaScript?
- Explain the difference between "clientHeight," "offsetHeight," and "scrollHeight."
- How do you add an event listener to an element in the DOM?
- What is the purpose of the XMLHttpRequest object in JavaScript?
- How can you make an HTTP request in JavaScript using the Fetch API?
- What is CORS, and how do you handle it in JavaScript?
- Explain the difference between the "localStorage" and "sessionStorage" objects.
- How do you manipulate CSS properties in JavaScript?
- What is the "Event" object in JavaScript, and how is it used?
- Describe the difference between "target" and "currentTarget" in event handling.
- What are unit tests, and how can you write them in JavaScript?
- Explain the purpose of a test runner in JavaScript testing.
- How can you use the "debugger" statement in JavaScript for debugging?
- Describe the concept of "console.log" and its usage in debugging.
- What is a breakpoint, and how do you set one in a browser's developer tools?
- How can you handle runtime errors in JavaScript code?
- Explain the purpose of "try-catch" blocks in error handling.
- What is linting in JavaScript, and why is it important?
- How do you use the "console.assert" method for debugging?
- What is a stack trace, and how can it help in debugging JavaScript code.
- What is npm, and how do you use it in JavaScript development?
- Describe the purpose of package.json in a Node.js project.
- What is Yarn, and how does it differ from npm?
- How do you install and manage third-party libraries using npm or Yarn?
- Explain the role of Webpack in JavaScript development.
- What are Babel and its role in transpiling JavaScript code?
- How does ESLint help maintain code quality in a JavaScript project?
- Describe the purpose of Git and version control in JavaScript development.
- What is Continuous Integration (CI) and how can it be used in JavaScript projects?
- How can you automate tasks in a JavaScript project using tools like Grunt or Gulp.
- What is Cross-Site Scripting (XSS), and how can you prevent it in JavaScript?
- Explain Cross-Origin Resource Sharing (CORS) and its security implications.
- How can you protect against SQL injection in JavaScript?
- Describe the importance of input validation in web applications.
- What are Content Security Policy (CSP) headers and how do they enhance security?
- How can you securely store sensitive information in a JavaScript application?
- Explain the concept of HTTPS and its importance in web security.
- What is the purpose of code splitting, and how can it improve page load times?
- Explain the benefits of lazy loading and how it's implemented in JavaScript applications.
- What is the critical rendering path, and how can you optimize it for better performance?
- Describe the importance of minification and compression in optimizing JavaScript code.
- How does browser caching work, and what are its advantages in web performance?
- What are the best practices for reducing the number of HTTP requests in a web page?
- Explain how the "defer" and "async" attributes in script tags affect page loading.
- How can you profile and optimize JavaScript code using browser developer tools?
- Describe the concept of "Render-Blocking JavaScript" and how to minimize it.
- What are the benefits of using a Content Delivery Network (CDN) for serving JavaScript libraries?
- Explain the purpose of the Fetch API for making HTTP requests in JavaScript.
- How do you handle CORS-related issues when making cross-origin requests?
- What is the difference between "GET" and "POST" HTTP methods, and when would you use each?
- Describe the concept of RESTful APIs and their common conventions.
- How can you use the "async" and "await" keywords with the Fetch API for asynchronous operations?
- Explain the purpose of the "XMLHttpRequest" object and its alternatives.
- What is JSON, and how do you parse and stringify JSON data in JavaScript?
- How can you work with asynchronous code using Promises and the "then" method?
- What are WebSockets, and how can they be used for real-time communication in JavaScript?
- Explain the concept of callback hell and how to avoid it in asynchronous code.
- Describe the purpose of the "axios" library for making HTTP requests in JavaScript.
- What is the Module Pattern, and how does it help organize code in JavaScript?
- Explain the Singleton Pattern and its use in JavaScript applications.
- How does the Observer Pattern work in JavaScript, and when is it useful?
- What is the Revealing Module Pattern, and how does it differ from the Module Pattern?
- Describe the benefits of using the Prototype Pattern in JavaScript.
- How can you implement the Factory Pattern in JavaScript?
- What is the Constructor Pattern, and how is it used to create objects?
- Explain the MVC (Model-View-Controller) pattern and its application in JavaScript frameworks.
- Describe the MVVM (Model-View-ViewModel) pattern and its role in frameworks like Knockout.js.
- How do you implement the Flux architecture in JavaScript applications, and what libraries are associated with it.
- How does React use the virtual DOM to make things faster?
- What are React Hooks, and why are they useful?
- Can you explain the difference between controlled and uncontrolled components in React?
- What is JSX in React, and how is it different from regular HTML? Can you provide an example?
- How does the
useEffecthook help in React? Can you give an example? - Why is the
keyattribute important when working with lists in React? - What is the purpose of the
setStatemethod in React, and why is it used? - Explain the concept of props in React and how they differ from state.
- How does conditional rendering work in React, and can you provide an example?
- What is the significance of the
rendermethod in a React component? - How do you handle forms in React, and what is the role of controlled components?
- What is the purpose of the
React.Fragmentin React?
- Can you explain Higher Order Components (HOC) in React in simple terms?
- What is Redux, and how does it work with React?
- Explain the Flux architecture briefly and its connection to React.
- When should you use Redux instead of local state management in React?
- How is React Context different from Redux for state management?
- What is the
shouldComponentUpdatemethod in React, and why is it important for performance? - What are useMemo and useCallback hooks in React, and when do you use each?
- Can you give an example of code splitting in React? Why is it useful?
- What is server-side rendering (SSR) in React, and why might you use it?
- How does the
dangerouslySetInnerHTMLattribute work in React? - What are portals in React, and when might you use them?
- How does lazy loading improve React app performance?
- How do you prevent unnecessary re-renders in React?
- Explain the difference between state and context in React.
- How does event handling differ in React compared to traditional HTML?
- Explain the concept of "lifting state up" in React and when it is beneficial.
- What is the significance of the
thiskeyword in class components in React? - How does error handling work in React applications?
- What are React refs, and how are they used in React components?
- How does the
componentDidMountlifecycle method differ fromuseEffectin functional components?
- How can a child component communicate with a parent in React?
- How do you pass data from one React component to another?
- What is the difference between real DOM and virtual DOM in React?
- How can you make React re-render only a specific component without the entire browser?
- What distinguishes stateful and stateless components in React?
- How do you send data from a parent component to a child component in React?
- Why did React move away from class-based components?
- What is the
useEffecthook, and why is it useful in React? - Explain lazy routing in React with a simple example.
- Why use className instead of class in React for styling?
- What is an error boundary in React, and why is it helpful?
- How does Axios differ from Fetch in React, and when would you use each?
- What are the limitations of React.js?
- Differences between local storage and session storage in React, and how do you use them?
- Why is React so popular?
- What is JSX, and how does it make React development easier?
- How do
useMemoanduseCallbackdiffer in React, and when do you use each? - Differences between
useStateanduseReducerin React and their use cases. - Explain the purpose of
React.createRefin React and when it's preferable. - What does the
memofunction do in React, and when would you use it? - What is the role of the
useLayoutEffecthook in React, and when is it used? - Differences between shallow rendering and full rendering in React testing.
- What is the role of the
childrenprop in React components? - How does React handle routing in Single Page Applications (SPAs)?
- What does the
dangerouslySetInnerHTMLprop do in React? - When and why would you use
React.PureComponentin React? - Explain automatic batching in React and how it improves performance.
- What is an error boundary in React, and why is it helpful?
- Differences between useState and useReducer in React and their use cases.
- What is suspense in the server in React, and how does it contribute to improving user experience in asynchronous operations?
- What is reconciliation in React, and how does it play a crucial role in updating the DOM efficiently?
- Differences between Higher Order Components and React Hooks.
- Differences between functional components and class-based components and why functional components are needed.