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Top 50 JavaScript Interview Questions and Answers

In this video we will be covering top 50 javascript interview questions and answers for beginners. ⭐▬▬▬▬▬▬ TIMESTAMPS 👋 ▬▬▬▬▬▬⭐ 00:00 What are the data types in JavaScript? 01:44 What is the difference between == and ===? 03:19 What is the difference between null and undefined? 05:33 Explain the concept of hoisting in JavaScript. 07:24 What is the difference between let, const, and var? 11:28 What is variable scope in JavaScript? 14:28 Explain the difference between global and local variables. 16:25 What is the temporal dead zone? 19:19 What is variable shadowing? 20:04 What is a closure in JavaScript? 21:39 What are the different ways to define a function in JavaScript? 26:13 What is a higher-order function? 27:28 Explain the concept of function hoisting. 28:54 What is a pure function? 29:56 What is the difference between function declaration and function expression? 32:04 What is an Immediately Invoked Function Expression (IIFE)? 33:05 How do you create an object in JavaScript? 34:11 How do you add/remove properties to an object dynamically? 36:27 How do you check if a property exists in an object? 37:55 What is the purpose of the this keyword in JavaScript? 40:49 What are the different ways to loop through an array in JavaScript? 43:25 Explain the difference between for...in and for...of loops. 45:00 How do you add/remove elements from an array? 46:32 What is the purpose of the map() function? 48:23 Explain the difference between filter() and find() methods. 50:07 Explain the difference between some() and every() method. 52:44 How do you select elements in the DOM using JavaScript? 55:04 How do you create and append elements to the DOM? 56:54 Explain the difference between innerHTML and textContent. 59:07 How do you remove an element from the DOM? 01:00:37 What are arrow functions and how do they differ from regular functions? 01:02:32 Explain the concept of destructuring in JavaScript. 01:04:00 What are template literals? 01:06:23 How do you use the spread operator? 01:08:23 What are default parameters in ES6? 01:09:56 How do you use the rest parameter in functions? 01:12:01 What is callback & callback hell explain with example 01:13:59 What is a Promise in JavaScript with example? 01:16:25 How do you chain Promises? 01:18:19 What is the purpose of the Promise.all() method? 01:19:28 What is the purpose of the finally() method in Promises? 01:21:21 What is the purpose of the async await ? 01:23:25 How do you handle errors in async/await? 01:24:55 What is the difference between async/await and Promises? 01:25:39 What is the difference between default and named exports? 01:26:35 How do you convert a JavaScript object to a JSON string ? 01:28:35 How do you parse a JSON string back into a JavaScript object? 01:29:56 What is localStorage in JavaScript, and how do you store and retrieve data from it? 01:30:13 What is the difference between localStorage and sessionStorage? 01:31:35 How do you delete a specific item from localStorage or clear all data from it? ⭐▬▬▬▬▬▬ PLEASE LEAVE A STAR :) 👋 ▬▬▬▬▬▬⭐ Source Code : https://github.com/sangammukherjee/to... 👋▬▬▬▬▬▬ BUY ME A COFFEE :) ▬▬▬▬▬▬👋 https://www.buymeacoffee.com/sangammukh6 🔔▬▬▬▬▬▬ Subscribe for more! ▬▬▬▬▬▬🔔    / @sangammukherjee   👋 ▬▬▬▬▬▬ CONNECT WITH ME ▬▬▬▬▬▬👋 Linkedin :   / sangam-mukherjee-400488134   Instagram:   / sangam_mukherjee