Javascript Array MCQ Questions and Answers

Javascript Array MCQ Questions and Answers

Home | Javascript | Javascript Array

Javascript Array MCQ Questions and Answers : We provide quiz questions on Javascript Array where you can learn lots of objective questions with answers and you can also download pdf of javascript.

Page: 1/1

1) Consider the code snippet given below

var count = [1,,3];

What is the observation made?

2) Consider the following code snippet

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

3) The pop() method of the array does which of the following task ?

4) Consider the following code snippet :

 if (!a[i]) continue;

What is the observation made ?

5) What will happen if reverse() and join() methods are used simultaneously ?

6) 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 ?

7) 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

8) The primary purpose of the array map() function is that it

9) The reduce and reduceRight methods follow a common operation called

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