35 Important JavaScript Interview Questions and Answers

Posted by Questpond under JavaScript category on | Points: 350 | Views : 1100
This video is meant for freshers as well as developers, covering top questions for Javascript interview preparation -

Question 1:- Why do we call javascript as dynamic language?
Question 2:- how does javascript determine data types ?
Question 3:- What is typeof functions?
Question 4:- How to check data type in javascript ?
Question 5:- What are different datatypes in Javascript ?
Question 6:- Explain Undefined Data types ?
Question 7:- What is Null ?
Question 8:- Differentiate between Null and Undefined ?
Question 9:- Explain Hoisting ?
Question 10:- Are Javascript initialization hoisted ?
Question 11:- What are global variables ?
Question 12:- What are the issues with Global variables ?
Question 13:- What happens when you declare variable with out VAR ?
Question 14:- What is Use Strict ?
Question 15:- How to force developers to use Var keyword ?
Question 16:- How can we handle Global Variables ?
Question 17:- How can we avoid Global variables ?
Question 18:- What are Closures ?
Question 19:- Why do we need Closures ?
Question 20:- Explain IIFE ?
Question 21:- What is the use of IIFE ?
Question 22:- What is name collision in global scope ?
Question 23:- IIFE vs Normal Function?
Question 24:- What are design patterns ?
Question 25:- Which is the most used design pattern?
Question 26:- What is module Pattern and revealing module pattern ?
Question 27:- What are the various ways to create JavaSCript objects?
Question 28:- How can we do inheritance in Javascript ?
Question 29:- What is prototype in Javascript ?
Question 30:- Explain Prototype chaining ?
Question 31:- What is Let Keyword?
Question 32:- Are Let variables hoisted ?
Question 33:- Explain Temporal Dead Zone ?
Question 34:- Let vs Var
Question 35:- String Concantentation and Arthimetic puzzle



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