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Welcome to the Classes and Modules MCQs Page

Dive deep into the fascinating world of Classes and Modules with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Classes and Modules, a crucial aspect of JavaScript. In this section, you will encounter a diverse range of MCQs that cover various aspects of Classes and Modules, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within JavaScript.

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Check out the MCQs below to embark on an enriching journey through Classes and Modules. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of JavaScript.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Classes and Modules. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Classes and Modules MCQs | Page 1 of 7

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Q1.
The behaviour of the instances present of a class inside a method is defined by

a.

Method

b.

Classes

c.

Interfaces

d.

Classes and Interfaces

Discuss
Answer: (b).Classes
Q2.
The keyword or the property that you use to refer to an object through which they were invoked is

a.

from

b.

to

c.

this

d.

object

Discuss
Answer: (c).this
Q3.
Consider the following code snippet :

var o = new F();
o.constructor === F

The output would be :

a.

false

b.

true

c.

0

d.

1

Discuss
Answer: (b).true
Q4.
The basic difference between JavaScript and Java is

a.

There is no difference

b.

Functions are considered as fields

c.

Variables are specific

d.

Functions are values, and there is no hard distinction between methods and fields

Discuss
Answer: (d).Functions are values, and there is no hard distinction between methods and fields
Q5.
The meaning for Augmenting classes is that

a.

objects inherit prototype properties even in dynamic state

b.

objects inherit prototype properties only in dynamic state

c.

objects inherit prototype properties in static state

d.

None of the mentioned

Discuss
Answer: (a).objects inherit prototype properties even in dynamic state
Q6.
The property of JSON() method is:

a.

it can be invoked manually as object.JSON()

b.

it will be automatically invoked by the compiler

c.

it is invoked automatically by the JSON.stringify() method

d.

it cannot be invoked in any form

Discuss
Answer: (c).it is invoked automatically by the JSON.stringify() method
Q7.
When a class B can extend another class A, we say that

a.

A is the superclass and B is the subclass

b.

B is the superclass and A is the subclass

c.

Both A and B are the superclass

d.

Both A and B are the subclass

Discuss
Answer: (a).A is the superclass and B is the subclass
Q8.
If A is the superclass and B is the subclass, then subclass inherting the superclass can be represented as

a.

B=inherit(A);

b.

B=A.inherit();

c.

B.prototype=inherit(A);

d.

B.prototype=inherit(A.prototype);

Discuss
Answer: (c).B.prototype=inherit(A);
Q9.
The snippet that filters the filtered set is

a.

var t=new FilteredSet(s, {function(s) {return !(x instanceof Set);});

b.

var t=new FilteredSet{function(s) {return !(x instanceof Set);});

c.

var t=new FilteredSet(s, {function(s) {return (x instanceof Set);});

d.

var t=new FilteredSet(s, {function(s) {return x;});

Discuss
Answer: (a).var t=new FilteredSet(s, {function(s) {return !(x instanceof Set);});
Q10.
The method that can be used to create new properties and also to modify the attributes of existing properties is

a.

Object.defineProperty()

b.

Object.defineProperties()

c.

Both Object.defineProperty() and Object.defineProperties()

d.

None of the mentioned

Discuss
Answer: (c).Both Object.defineProperty() and Object.defineProperties()
Page 1 of 7

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