JavaScript Interview Questions & Answers | JavaScript Interview Questions

For more JavaScript Q&A videos visit http://www.questpond.com Learn JavaScript Interview Question & Answers with real-time examples - _________________________________________________________________________ 00:00 Introduction 2:50 Question 1:- Why do we call JavaScript as dynamic language? 3:54 Question 2:- how does JavaScript determine data types ? 4:44 Question 3:- What is typeof functions? 4:44 Question 4:- How to check data type in JavaScript ? 5:21 Question 5:- What are different datatypes in JavaScript ? 7:51 Question 6:- Explain Undefined Data types ? 8:36 Question 7:- What is Null ? 9:02 Question 8:- Differentiate between Null and Undefined ? 9:41 Question 9:- Explain Hoisting ? 10:51 Question 10:- Are JavaScript initialization hoisted ? 11:39 Question 11:- What are global variables ? 12:06 Question 12:- What are the issues with Global variables ? 12:30 Question 13:- What happens when you declare variable with out VAR ? 13:30 Question 14:- What is Use Strict ? 13:30 Question 15:- How to force developers to use Var keyword ? 14:26 Question 16:- How can we handle Global Variables ? 14:26 Question 17:- How can we avoid Global variables ? 16:14 Question 18:- What are Closures ? 19:16 Question 19:- Why do we need Closures ? 22:52 Question 20:- Explain IIFE ? 24:40 Question 21:- What is the use of IIFE ? 24:40 Question 22:- What is name collision in global scope ? 24:40 Question 23:- IIFE vs Normal Function? 28:12 Question 24:- What are design patterns ? 28:52 Question 25:- Which is the most used design pattern? 29:03 Question 26:- What is module Pattern and revealing module pattern ? 33:57 Question 27:- What are the various ways to create JavaScript objects? 35:55 Question 28:- How can we do inheritance in JavaScript ? 35:55 Question 29:- What is prototype in JavaScript ? 35:55 Question 30:- Explain Prototype chaining ? 43:41 Question 31:- What is Let Keyword? 45:52 Question 32:- Are Let variables hoisted ? 48:27 Question 33:- Explain Temporal Dead Zone ? 51:28 Question 34:- Let vs Var 58:12 Question 35:- String Concatenation and Arithmetic puzzle Question 36 :- What is class in ES6 ? Question 37 :- So with class Keyword does it imply JavaScript is a OOP language ? Question 38 :- Differentiate between class and normal function ? Question 39 :- What is a Arrow function ? Question 40 :- Why do we use Arrow function ? Question 41 :- Differentiate between Arrow vs Normal Function ? Question 42 :- Does Arrow function create its own this ? Question 43. Explain Synchronous execution ? Question 44. What is a call Stack ? Question 45. What is a blocking call ? Question 46. How to avoid blocking calls ? Question 47. Explain Asynchronous execution ? Question 48. Synch vs Asynch ? Question 49. How can we do Asynch calls ? Question 50. What is a thread ? Question 51. Explain Multi-threading ? Question 52. Is JavaScript Multi-threaded ? Question 53. Then how does Settimeout run ? Question 54. What is a WebAPI/Browser API ? Question 55. What is a Event loop and callback queue? Question 56. 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