#Javascript #FrontendInterview #AccioJob Javascript Interview Questions on closures will be discussed in this video including topics like Lexical Scope, Scope Chain, Output based Questions, Once and Memoize Polyfills, etc. Apply Now for free (AccioJob) : https://bit.ly/3M4V88q AccioJob is an IIT Delhi alumni-led startup that runs a 6 month Pay after Placement Full Stack Web Dev Training. Students are trained on Data Structures and Algorithms, Full Stack Web Development and backend web development. Students get placed above 5 LPA. AccioJob students are working at Amazon, Walmart, VISA, BharatPe, Paytm, ThoughtWorks and 190+ more companies. Key Highlights of the program: - ZERO fees till Placement above 5 LPA in Software Development - Average CTC: 8.3 LPA; Highest CTC: 41LPA - Dedicated placement team & Interview preparation - Industry-relevant Projects, Mock Interviews, Resume & Portfolio building 🟦 Follow me on Twitter and u will clear your interview 🤓 - https://twitter.com/piyush_eon ⭐ Support the channel and learn from me One on One - null 📖 Blog for this video - https://roadsidecoder.hashnode.dev/closures-javascript-interview-questions 🔗 Var, Let and Const Interview Video - https://www.youtube.com/watch?v=oUWRxJ19gfE 🔗 Functions Interview Video - https://www.youtube.com/watch?v=btwFJT_xzdg 🔗 JavaScript Interview Series -    • Javascript Interview Questions   🔗 Cars24 Interview Experience - https://www.youtube.com/watch?v=vxggZffOqek 🔗 Unacademy Interview Experience - https://www.youtube.com/watch?v=abbdJ4Yfm54 🔗 MERN Stack Tutorial with Redux - https://www.youtube.com/watch?v=IQXjO0t4XRM 🔗 React Beginner's Project Tutorials -    • React JS Project Tutorials 🔥🔥   ------------------------------------------------------------------------- 00:00 Intro 00:33 What is Lexical Scope? 02:22 A great oppertunity for you! 03:38 Lexical Scope - Interview Question 04:52 What is Closure? 05:43 Example of Closures 06:56 Why Closure? 08:19 Closure Scope Chain 11:12 Question 1 - What will it print ? 13:09 Question 2 - Write a function for this 15:28 Question 3 - Time Optimisation with Closures 18:07 Question 4 - setTimeout + block scope with Closures 23:07 Question 5 - Create a private counter 25:48 Question 6 - What is Module Pattern? 27:31 Question 7 - Make this run only once 30:14 Question 8 - Once Polyfill Implementation 34:02 Question 9 - Memoise/Caching Implementation 39:37 Question 10 - Closure vs Scope 40:22 Written Article for this video ------------------------------------------------------------------------- Special Thanks to our members - Trevor M Srinivas Ayyagari