Web Development & Javascript Notes - Frontend Resources

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How React's ES6 syntax is different from ES5 syntax?

1. require vs. Import // ES5 var React = require('react'); // ES6 import React from 'react';

2. exports vs. export

// ES5 module.exports = Component; // ES6 export default Component;

 3. component and function

// ES5 var MyComponent = React.createClass({ render: function() { return( <h3>Hello JavaTpoint</h3> ); } }); // ES6 class MyComponent extends React.Component { render() { return( <h3>Hello Javatpoint</h3> ); } }

4. props

// ES5 var App = React.createClass({ propTypes: { name: React.PropTypes.string }, render: function() { return( <h3>Hello, {this.props.name}!</h3> ); } }); // ES6 class App extends React.Component { render() { return( <h3>Hello, {this.props.name}!</h3> ); } }

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Web Development Interview Questions Part-2 11. What are semantic HTML elements? Answer: Semantic elements clearly describe their meaning in a human- and machine-readable way. Examples: <header>, <footer>, <article>, <nav>. 12. What are HTTP status codes? Answer: They indicate the result of an HTTP request. Common ones: 200 OK (Success) 404 Not Found 500 Internal Server Error 401 Unauthorized 403 Forbidden 13. What is the box model in CSS? Answer: The box model includes: Content Padding Border Margin It defines how space is taken up around HTML elements. 14. What are pseudo-classes in CSS? Answer: Pseudo-classes style elements based on their state. Examples: :hover (when mouse is over) :first-child :nth-child() 15. How do you make a website SEO-friendly? Answer: Use semantic HTML Add meta tags and alt text Mobile responsiveness Fast loading speed Proper URL structure 16. What is the difference between synchronous and asynchronous in JavaScript? Answer: Synchronous: Code runs line by line Asynchronous: Tasks like API calls don't block other code; use callbacks, promises, or async/await 17. What is a promise in JavaScript? Answer: A Promise represents the result of an async operation. It can be: Pending Fulfilled Rejected 18. What is event bubbling and capturing in JavaScript? Answer: Bubbling: Event propagates from child to parent Capturing: Event goes from parent to child You can control it using event.stopPropagation() 19. What is a CDN? Answer: CDN (Content Delivery Network) delivers static files (images, CSS, JS) via servers closest to the user to improve website speed. 20. What tools do you use for version control? Answer: Most common: Git + GitHub Git tracks changes in code, and GitHub helps you collaborate and manage versions. Credits: https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z/847

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Frontend web development: https://www.w3schools.com/html https://www.w3schools.com/css https://www.jschallenger.com https://javascript30.com https://t.me/webdevcoursefree/110 https://t.me/Programming_experts/107 Backend development: https://learnpython.org/ https://t.me/pythondevelopersindia/314 https://www.geeksforgeeks.org/java/ https://introcs.cs.princeton.edu/java/11cheatsheet/ https://docs.microsoft.com/en-us/shows/beginners-series-to-nodejs/?languages=nodejs Database: https://mode.com/sql-tutorial/introduction-to-sql https://www.sqltutorial.org/wp-content/uploads/2016/04/SQL-cheat-sheet.pdf https://books.goalkicker.com/MySQLBook/MySQLNotesForProfessionals.pdf https://docs.oracle.com/cd/B19306_01/server.102/b14200.pdf https://leetcode.com/problemset/database/ Cloud Computing: https://bit.ly/3aoxt1N https://t.me/free4unow_backup/366 UI/UX: https://www.freecodecamp.org/learn/responsive-web-design/ https://bit.ly/3r6F9xE ENJOY LEARNING 👍👍

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Top python frameworks for web development

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