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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 9 of 12

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Q81.
The annotation used in Java to override the method of a super-class or interface by the subclass or implementing class is ___.

a.

@override

b.

@Override

c.

@super

d.

@subclass

Discuss
Answer: (b).@Override
Q82.
It is ___ to override the static method of an Interface in Java.

a.

possible

b.

not possible

c.

Depends on Compiler

d.

Can't Say

Discuss
Answer: (b).not possible
Q83.
A Java static method can not be ___.

a.

private or protected

b.

final

c.

abstract

d.

All the above

Discuss
Answer: (d).All the above
Q84.
Which is the missing java code in the class implementing an Interface below? 
interface Linein
{  void addInput(); }

interface Lineout
{  void addOutput(); }

class Speaker implements Linein, Lineout
{
  //MISSING CODE
}

a.

class Speaker implements Linein, Lineout
{
@Override
public void addOutput() { }

@Override
public void addInput() { }
}

b.

class Speaker implements Linein, Lineout
{
@Override
public void addOutput() { }
}

c.

class Speaker implements Linein, Lineout
{
@Override
public void addInput() { }
}

d.

All the above

Discuss
Answer: (a).class Speaker implements Linein, Lineout
{
@Override
public void addOutput() { }

@Override
public void addInput() { }
}
Q85.
Which is the missing code to successfully compile the below Java program with abstract classes and Interfaces? 
interface A
{  void a(); }

abstract class B implements A
{  abstract void b(); }

class C extends B
{
  //Missing methods
}

a.

@Override
public void a() { }

@Override
void b() {}

b.

@Override
public void a() { }

c.

@Override
void b() {}

d.

All the above

Discuss
Answer: (a).@Override
public void a() { }

@Override
void b() {}
Q86.
A Superinterface is comparable to a Superclass. State TRUE or FALSE.

a.

TRUE

b.

FALSE

c.

May be TRUE or FALSE

d.

Can't Say

Discuss
Answer: (a).TRUE
Q87.
A Static method of an Interface should be accessed with _____ and a DOT operator.

a.

Class Name

b.

Interface Name

c.

An object of a concrete class

d.

None of the above

Discuss
Answer: (b).Interface Name
Q88.
What is a package in Java?

a.

A Package is a collection of files of type Java Class, Interfaces, or Abstract Class

b.

A Package is simply a Directory or Folder with Java Classes

c.

A Package usually contains Java Classes written for a specific purpose or problem

d.

All the above

Discuss
Answer: (d).All the above
Q89.
Choose the correct syntax of a Java Package below.

a.

package PACKAGE_NAME;

b.

package PACKAGE_NAME.*;

c.

pkg PACKAGE_NAME;

d.

pkg PACKAGE_NAME.*;

Discuss
Answer: (a).package PACKAGE_NAME;
Q90.
The keyword used to declare a Java package is ____.

a.

pkg

b.

package

c.

pkge

d.

None of the above

Discuss
Answer: (b).package
Page 9 of 12

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