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Welcome to the Interfaces and Packages MCQs Page

Dive deep into the fascinating world of Interfaces and Packages with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Interfaces and Packages, a crucial aspect of Java Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Interfaces and Packages, 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 Java Programming.

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Check out the MCQs below to embark on an enriching journey through Interfaces and Packages. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Java Programming.

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

Interfaces and Packages MCQs | Page 6 of 12

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Q51.
Which of the following is true about methods in an interface in java?

a.

An interface can contain only abstract method.

b.

We can define a method in an interface

c.

Private and protected access modifiers can also be used to declare methods in interface

d.

None of the above

Discuss
Answer: (a).An interface can contain only abstract method.
Q52.
Can "abstract" keyword be used with constructor, Initialization Block, Instance Initialization and Static Initialization Block.

a.

True

b.

False

c.

May be True or False

d.

Can't Say

Discuss
Answer: (b).False
Q53.
Package in Java is a mechanism to encapsulate a ______________.

a.

Classes

b.

Sub Packages

c.

Interfaces

d.

All of the above

Discuss
Answer: (d).All of the above
Q54.
Package names and directory structure are closely related.

a.

True

b.

False

c.

May be True or False

d.

Can't Say

Discuss
Answer: (a).True
Q55.
An _______________ statement can be used to access the classes and interface of a different package from the current package.

a.

instanceOf

b.

import

c.

extends

d.

implement

Discuss
Answer: (b).import
Q56.
Which of the following packages is used to includes classes to create user interface like Button and Checkbox?

a.

java.lang

b.

java.net

c.

java.awt

d.

java.io

Discuss
Answer: (c).java.awt
Q57.
Which of the following packages is used to includes utility classes like Calendar, Collection, Date?

a.

java.lang

b.

java.net

c.

java.awt

d.

java.util

Discuss
Answer: (d).java.util
Q58.
Which of the following is the correct way of importing an entire package "pkg"?

a.

import pkg.

b.

Import pkg.

c.

import pkg.*

d.

Import pkg.*

Discuss
Answer: (c).import pkg.*
Q59.
Which of the following is false statement about package in java?

a.

Packages are used for preventing naming conflicts

b.

Providing controlled access: protected and default have package level access control.

c.

Packages cannot be considered as data encapsulation

d.

both a and c

Discuss
Answer: (c).Packages cannot be considered as data encapsulation
Q60.
Packages that are inside another package are the _________

a.

packages

b.

nested packages

c.

util subpackages

d.

subpackages

Discuss
Answer: (d).subpackages
Page 6 of 12

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