Explore topic-wise MCQs in Technical MCQs.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Technical MCQs knowledge and support exam preparation. Choose a topic below to get started.

1.

JavaScript provides a special constructor function called Object() to build the object.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
E.
Answer» B. FALSE
Discussion
2.

The ________ operator is used to create an instance of an object.

A. this
B. self
C. find
D. new
Answer» E.
Discussion
3.

The syntax for adding a property to an object is?

A. objectProperty == propertyValue;
B. objectProperty = propertyValue;
C. objectName.objectProperty = propertyValue;
D. objectName.objectProperty == propertyValue;
Answer» D. objectName.objectProperty == propertyValue;
Discussion
4.

The capability to store one object inside another object known as?

A. Encapsulation
B. Aggregation
C. Inheritance
D. Polymorphism
Answer» C. Inheritance
Discussion
5.

const event = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
console.log (event.toLocaleString('en-IN', { timeZone: 'UTC' }));
11.A programming language can be called object-oriented if it provides ________ basic capabilities to developers

A. 1
B. 2
C. 3
D. 4
Answer» E.
Discussion
6.

what will be the output of below code?

A. 20/12/2012, 3:00:00
B. 12/20/2012, 3:00:00
C. 20/12/2012, 3:00:00 am
D. 2012/12/20, 3:00:00 am
Answer» D. 2012/12/20, 3:00:00 am
Discussion
7.

If para1 is the DOM object for a paragraph, what is the correct syntax to change the text within the paragraph?

A. "New Text"?
B. para1.value="New Text";
C. para1.firstChild.nodeValue= "New Text";
D. para1.nodeValue="New Text";
Answer» C. para1.firstChild.nodeValue= "New Text";
Discussion
8.

Object ......... is the process of converting an objects state to a string from which it can later be restored.

A. prototype
B. class
C. serialization
D. extensible
Answer» D. extensible
Discussion
9.

var todaysDate = new Date()
console.log( todaysDate.toLocaleString() );
7......... serializes only the enumerable own properties of an object.

A. JSON.Parse()
B. JSON.Stringify()
C. JSON.Null()
D. JSON.Objectify()
Answer» C. JSON.Null()
Discussion
10.

var val = "JavaScript String"
splittedVal = val.split('a',2)
console.log(splittedVal);
6.what will be the output of below code? NOTE: The code is executed on 2019-5-9

A. 2019-05-09T09:29:53.181Z
B. 2019-5-9
C. 15:00:34
D. 2019-5-9 15:02:35
Answer» E.
Discussion
11.

var materials = [
'Table',
'Chair',
'Boxes',
'Press'
];

console.log(materials.map (material => material.length));
5.what will be the output of below code?

A. [ 'J', 'v' ]
B. [ 'J' ,'v','Script']
C. [ 'J', 'v', 'Script String' ]
D. [ 'JavaScript String' ]
Answer» B. [ 'J' ,'v','Script']
Discussion
12.

var materials = [
'Hydrogen',
'Helium',
'Lithium',
'Beryllium'
];

console.log(materials.map (material => material.length));
4.What will be printed in the console on execution of the below code?

A. [5,5,5,5]
B. [5]{4}
C. [5]
D. Both A and B
Answer» B. [5]{4}
Discussion
13.

var array = [2, 4, 6, 7, 8, 10];
var myArr= array.filter(v => v / 2 === 0);

console.log(myArr);
3.What will be printed in the console on execution of the below code?

A. [8, 6, 7, 9]
B. 4
C. [4]
D. 8, 6, 7, 9
Answer» B. 4
Discussion
14.

var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
var myArr= array.filter(v => v % 3 === 0);

console.log(myArr);
2.What will be printed in the console on execution of the following JS code:

A. myArr
B. [2, 4, 6, 7, 8, 10]
C. [2, 4, 6, 8, 10]
D. [7]
Answer» D. [7]
Discussion
15.

What will be printed in the console on execution of the following JS code:

A. myArr
B. [3, 6, 9, 12, 15]
C. [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
D. [1, 2, 4, 5, 7, 8, 10, 11, 13, 14]
Answer» C. [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
Discussion