Consider the code snippet given below<br/> <pre>var count = [1,,3];</pre> <br/>What is the observation made?

Consider the code snippet given below

var count = [1,,3];

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);

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

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

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

1

[4,5].

[3,4,5].

Exception is thrown

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

isarrayType()

==

===

typeof

Consider the code snippet given below

var count = [1,,3];