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) Consider the code snippet given below

var count = [1,,3];

What is the observation made?

3) Consider the following code snippet

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

4) Consider the following code snippet :

 if (!a[i]) continue;

What is the observation made ?

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

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