Maaz Khan’s Post

Most asked 5 🚀 ReactJS (76 to 80) interview questions ✏️. 😎😎😎😎😎😎 👉 Q76. What are the differences between React and Angular in terms of architecture and features? 📗Ans: React uses a component-based architecture with JSX for templating, while Angular is a full-fledged framework with built-in features like two-way data binding and routing. React offers more flexibility and a simpler learning curve, while Angular provides more opinionated solutions out of the box. 👉 Q77. What are the differences between React and Angular in terms of performance? 📗Ans: React's virtual DOM and one-way data flow generally lead to better performance by updating only changed parts. Angular's two-way data binding can sometimes cause performance issues, but Ahead-of-Time (AOT) compilation can help mitigate them. React's lightweight nature and efficient updates contribute to its performance advantages. 👉 Q78. What are the differences between React and Vue.js? 📗Ans: React and Vue.js both use virtual DOMs, but React promotes a more JavaScript-centric approach with JSX, while Vue.js offers simplicity and reactivity out of the box. React is more of a library, allowing developers to choose additional tools, while Vue.js feels more like a framework with more built-in solutions. 👉 Q79. What are the benefits of using React hooks over class components? 📗Ans: React Hooks allow functional components to manage state and lifecycle features previously exclusive to class components, promoting cleaner and more reusable code. Hooks avoid the complexities of class components and encourage a functional programming style, leading to simpler and more concise code with better organization. 👉 Q80. Explain the role of the render method in React class components. 📗Ans: In React class components, the render method defines how the UI should look based on the component's current state and props. It returns a React element representing the component's output. Whenever state or props change, React calls the render method to update the UI accordingly, ensuring it reflects the latest data. 📌Also check previous posts : 📍top 5 (71 to 75) questions : https://lnkd.in/dNdYJkcv 🚀 Follow and Connect with Me at Abhishek Patel #react #js #interviewquestions

#Linkedin Map Vs Object - Must to know for every frontend developer

#linkedIn Map Vs Objects 🤯 Key Differences Every Frontend Developer Should Know to Ace Javascript & Machine Coding Interviews 👇👇👇 Follow FrontendGeek to stay tuned for updates. Map Vs Objects - Here are the key differences every frontend developer should know 📌 Keys 💠Map only has "keys" provided 💠Objects have "prototype" keys as well inherited from parents 📌 Storage Types 💠A map can have any type of key either primitive or non-primitive like function, objects etc. 💠Object keys should be either strings or symbols 📌 Serializable 💠Map Not by default serializable, parse-able 💠Object is by default serializable using JSON.springify() and parse using JSON.parse() 📌 Insertion Order 💠In Map, By default, insertion happened in order 💠In Object, Order cant be guaranteed 📌 Iterable 💠Map can be directly iterable using for-of 💠Object iteration can be done using Object.keys() ✍️This will help you understand the key difference between Maps & Objects. Now always compare before using objects directly. 😮 Comment Down, which difference made you surprised !! Follow FrontendGeek to stay tuned for updates. #frontendinterview #frontendgeek #frontend #machinecoding #learning #ui #javascript #javascriptinterview #machinecodinginterview #course #js

🚀 Day 11/25 React Interview Questions - What is JSX in React? JSX stands for Javascript XML, and write HTML -like code inside javascript . This makes it much easier to create user interfaces in React. ⚓ Key point about JSX : 🌀 HTML-Like Syntax :- JSX looks like HTML, but it's actually Javascript! It allows you to mix HTML elements directly in your React code. 🌀 Dynamic Content :- You can include Javascript values inside JSX by wrapping them in curly braces { }. This lets you display dynamic information like a user's name, making your app interactive. 🌀 React Components :- JSX is commonly used to define React components, which are small pieces of your UI, like buttons or forms. Using JSX makes building these components feel more natural. 🌀 Easier to Read :- it's makes your code cleaner and eaiser to understand. It also helps catch errors . "JSX may look like HTML, but it's not! It's important to remember that JSX is transformed into Javascript at runtime." #dailylearning Prepleaf by Masai Masai #challenge #javascript #coding

Save this post and thank me later !! In most #frontend #interviews I will ask how #javascript works behind the scenes ? The most common answer is from Akshay Saini's video where they say execution context is created and later that will be removed from memory and new execution context will be created etc. Then I ask a simple question "Will #javascript be converted into ByteCode ? during execution ? " most don't answer that. I have got this image from #internet to explain how JS works behind the scenes. When JavaScript code runs, it's parsed into an Abstract Syntax Tree (AST), then interpreted into bytecode or machine code. A profiler monitors code execution, guiding the optimizing compiler (JIT) to generate highly optimized machine code using bytecode and profiling data. Incorrect assumptions may lead to "Deoptimize" phases. The JS Engine optimizes "hot functions" and utilizes techniques like inline caching. It manages the call stack to track executing functions and allocates memory using the memory heap. The garbage collector plays a vital role in reclaiming memory from unused objects. Can you comment the Interpreter used by Google chrome ? Follow me and I will help you to master frontend development: Vasanth Bhat #javascript #execution #interview #question

🚀 Excited to share some React.js knowledge which is I learned in 2 years 💡 Are you preparing for a React.js interview or simply looking to enhance your understanding of this powerful JavaScript library? Here's a common interview question along with a detailed explanation to help you level up your React skills: 🔍 **Interview Question:** "What is JSX in React and why is it used?" 💡 **Explanation: 💡 JSX, or JavaScript XML, is a syntax extension for JavaScript that allows developers to write HTML-like code directly within JavaScript. In React, JSX is commonly used to describe what the UI should look like. For example: ```jsx const element = <h1>Hello, world!</h1>; ``` Behind the scenes, JSX is transformed into regular JavaScript function calls, making it easier to work with React components. JSX provides several benefits: 1. **Readability:** JSX makes code more readable and maintainable by allowing developers to write HTML-like code within JavaScript, reducing the cognitive overhead of switching between languages. 2. **Performance:** JSX is optimized by React's compiler, resulting in faster rendering compared to manipulating the DOM directly with JavaScript. 3. **Code Organization:** JSX encourages the separation of concerns by co-locating markup and logic within components, leading to cleaner and more modular code. Understanding JSX is essential for building React applications efficiently and effectively. Stay tuned for more React tips and interview insights! #ReactJS #JavaScript #interviewtips #mernstack #WebDevelopment #frontenddevelopment #codingjourney #htmlcssjavascript

🧑💻 15 Javascript Topics Every Developer Should Know! Are you a seasoned JavaScript developer looking to level up your skills? Dive into these advanced topics to stay ahead in the ever-evolving world of web development. These concepts are crucial for building robust, scalable, and high-performance applications. 1. Event Loop and Concurrency Model Understand the JavaScript runtime environment, event loop, call stack, and how asynchronous operations are handled. 2. Async/Await and Promises Master asynchronous programming with Promises, async/await, and handling asynchronous operations seamlessly. 3. Web Workers Learn how to use Web Workers to run scripts in background threads, enhancing performance for heavy computations. 4. Memory Management and Garbage Collection Gain insights into JavaScript memory management, garbage collection, and techniques to optimize memory usage. 5. Service Workers and Progressive Web Apps (PWAs) Implement Service Workers for offline capabilities and create engaging PWAs that deliver native app-like experiences. 6. Modules and Module Bundlers Explore ES6 modules, dynamic imports, and popular module bundlers like Webpack, Rollup, and Parcel. 7. JavaScript Design Patterns Apply design patterns like Singleton, Factory, Observer, and Decorator to write modular, maintainable code. 8. Functional Programming in JavaScript Dive into functional programming concepts, including immutability, higher-order functions, and functional composition. 9. Reactive Programming and RxJS Leverage reactive programming with RxJS to handle asynchronous data streams efficiently. 10. WebAssembly (Wasm) Integrate WebAssembly for performance-critical parts of your application, allowing execution of code written in other languages. 11. Advanced Error Handling and Debugging Implement advanced error handling techniques, custom error types, and effective debugging practices. 12. TypeScript and Static Typing Use TypeScript to add static typing to JavaScript, improving code quality, maintainability, and development experience. 13. Security Best Practices Understand common security vulnerabilities (XSS, CSRF) and implement best practices to secure your JavaScript applications. 14. GraphQL Use GraphQL for efficient data fetching, providing a flexible and powerful alternative to REST APIs. 15. Micro-Frontends Architect large-scale applications with micro-frontends, allowing independent deployment and scaling of frontend components. #JavaScript #WebDevelopment #AdvancedJavaScript #Programming #TechSkills #SoftwareDevelopment

What happens when we run our JavaScript program? So when you run your beautiful code in JavaScript, an Execution Context is created. So if you are wondering what the heck is this Execution Context, you can think it of like the movie set where all the shots of the movies are to be taken. So everything in JavaScript happens inside this Execution Context. In the Execution Context, there are two main components. 1. Memory Component (Variable Environment): -> This component deals with the storage of variables and their values. -> Variables, functions, and objects are stored in memory during the execution of the program. -> Memory allocation occurs for each variable declared in the code, and their values are stored in memory. 2. Code Component (Thread of Execution): -> This component represents the sequence of steps executed by the JavaScript engine while running the program. -> The JavaScript engine processes each line of code in a specific order, executing statements one after the other. -> Control flows through the code, executing functions, expressions, and other statements as per the program's logic. #nodejs #js #javascript #interview #reactjs #angular #questions #job #working

Some Questions of React and JavaScript that are good to know for a Frontend Interview :D - let vs. const vs. var - Currying, partial application - How ‘this’ value is determined - Callbacks, Promises, Async/Await - Event Loop & Concurrency Model - ES7, ES8, and beyond: JS’s new features - JS Design Patterns: Writing efficient code - Prototypes: Concept and relation to Objects - DOM manipulation, event handling: Vanilla JS - Array, string manipulation: Common techniques - Arrow functions, Template literals, Destructuring - Higher-order Functions in functional programming - JS bundlers: Role in optimizing code for production - Hoisting: Impact on variable and function declarations - Throttling, Debouncing: Controlling function execution rate - Unit testing: Popular frameworks like Jest or Mocha - Web APIs: Importance and working with them in JS - Data structures: Linked lists, stacks, queues in JS - Caching, Memoization: Performance Techniques - Security best practices: XSS, CSRF protection - ES modules: Role in modern JS development - Functional vs. Class Components in React - == vs. ===: JavaScript value comparison - Prototypal vs. Classical Inheritance - Practical applications of Closures - Error handling: try...catch blocks - Scope chain, Lexical Scoping - map, filter, reduce, forEach #frontend #JavaScript #React

Hello, Connections I am sharing the Top 10 questions with answers in React that are asked in interviews. Q1✅️. What is React? Ans: React is an open-source JavaScript library for building user interfaces or Ul components, developed by Facebook. Q2✅️. Explain JSX Ans: JSX (JavaScript XML) is a syntax extension for JavaScript recommended by React for describing what the UI should look like. Q3✅️. What is the virtual DOM? Ans: The virtual DOM is a lightweight copy of the actual DOM in memory. React uses it to improve performance by updating only the changed parts of the actual DOM. Q4✅️. What are the state and props in React? Ans: A state is an internal data store that belongs to a specific component, and it can be changed over time. Props are properties passed to a component from its parent, and they are immutable. Q5✅️. What is the difference between state and props? Ans: State is internal to a component and can be changed over time, while props are external and passed to a component. Q6✅️. What is the purpose of setState in React? Ans: setState is used to update the state of a component and trigger a re-render. Q7✅️. What is a React Router? Ans: React Router is a library that enables navigation among views in a React application, allowing for the development of single-page applications. Q8✅️ Explain the use effect hook. Ans: The use effect hook in React is used for side effects in functional components, such as data fetching, subscriptions, or manually changing the DOM. Q9✅️. What is Redux, and why is it used? Ans: Redux is a state management library for JavaScript applications, commonly used with React. It helps manage the state of an application in a predictable way. Q10✅️. What is the difference between class components and functional components?  Ans: class components use ES6 classes and have additional features like state and lifecycle methods, while functional components are simpler and are often used with hooks. These are the most common questions #softwaredevelopment #openforopportunities #javascript #reactjs #softwareengineer