Javascript Array MCQ Questions and Answers
Home | Javascript | Javascript ArrayJavascript 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.
1) Consider the code snippet given below
var count = [1,,3];
What is the observation made?
Answer : A Discuss
2) Consider the following code snippet
var a1 = [,,,];
The result would be
var a2 = new Array(3);
0 in a1
0 in a2
3) The pop() method of the array does which of the following task ?
Answer : A Discuss
4) Consider the following code snippet :
if (!a[i]) continue;
What is the observation made ?
Answer : D Discuss
5) What will happen if reverse() and join() methods are used simultaneously ?
Answer : A Discuss
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
Answer : C Discuss
9) The reduce and reduceRight methods follow a common operation called
10) The method or operator used to identify the array is