Consider the following code snippet
  var a1 = [,,,];
var a2 =

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Consider the following code snippet

  var a1 = [,,,];
var a2 = new Array(3);
0 in a1
0 in a2
The result would be



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2) The primary purpose of the array map() function is that it

3) The method or operator used to identify the array is

4) The pop() method of the array does which of the following task ?

5) Consider the following code snippet :

 if (!a[i]) continue;

What is the observation made ?

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