Consider the following code snippet :
var a = ;
The final output for the shift() is
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1) The pop() method of the array does which of the following task ?
2) What will happen if reverse() and join() methods are used simultaneously ?
3) The method or operator used to identify the array is
4) The reduce and reduceRight methods follow a common operation called
5) Consider the following code snippet :
if (!a[i]) continue;
What is the observation made ?