Javascript Interview Questions

1. Closures with respect to returning functions (Practical Usage of Closure in Question 21.) A closure is a function having access to the parent scope, even after the parent function has closed. var  add = ( function  () {    var  counter =  0 ;    return   function  () {counter +=  1 ;  return  counter} })(); add(); add(); add(); // the counter is now 3 2. This The JavaScript  this  keyword refers to the object it belongs to. 3. Inheritance in js //ES 5 Inheritance function Parent ( g , d ){   this . genes = g ;   this . dna = d ; } Parent . prototype . getQualities = function (){   return this . genes + ' ' + this . dna ; } function Child ( g , d , m ){   Parent . call ( this , g , d );   this . myQualities = m ; } Child . prototype = Object . create ( Parent . prototype ); console . log ( new Parent ( "parent genes" , "parent dna" ). getQualities ()); console . log ( new Child ( "