Consider the code snippet given below
var count = [1,,3];
What is the observation made?
The omitted value takes “undefined”
This results in an error
This results in an exception
None of the mentioned
Answer : A
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1) Consider the following code snippet :
var a = [1,2,3,4,5];
a.slice(0,3);
What is the possible output for the above code snippet ?
2) The pop() method of the array does which of the following task ?
decrements the total length by 1
increments the total length by 1
prints the first element but no effect on the length
None of the mentioned
View Answer
3) What will happen if reverse() and join() methods are used simultaneously ?
Reverses and stores in the same array
Reverses and concatenates the elements of the array
Reverses
All of the mentioned
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4) Consider the following code snippet : var a = [];
a.unshift(1);
a.unshift(22);
a.shift();
a.unshift(3,[4,5]);
a.shift();
a.shift();
a.shift();
The final output for the shift() is
5) The method or operator used to identify the array is