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Consider the following code snippet var a1 = var a2 =...

This question belongs to Javascript Array And Function
Array and Function
?

Consider the following code snippet 
var a1 = [,,,]; 
var a2 = new Array(3); 
0 in a1 
0 in a2
The result would be

Answer & Solution
Correct Answer: Option A
a1 has an element with index 0 and a2 has no element with index 0.
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