Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

11 Views

Java Interfaces Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is an interface in Java?

A collection of private methods

A collection of related abstract public methods (correct)

A collection of final methods

A collection of static methods

Which keyword is used to create and define an interface in Java?

interface (correct)

class

method

abstract

What is true about methods and constants in interfaces in Java?

They are implicitly private

They are implicitly final

They are implicitly public (correct)

They are implicitly static

Can an interface be instantiated directly in Java?

No, interfaces cannot be instantiated directly Signup and view all the answers

What is true about inheriting an interface in Java?

An interface that extends another interface inherits all abstract methods Signup and view all the answers

What is an interface in Java?

A collection of related abstract public methods Signup and view all the answers

How are methods and constants in interfaces treated in Java?

Methods and constants in interfaces are implicitly public, and constants are also static and final Signup and view all the answers

Which of the following is true about inheriting an interface in Java?

An interface that extends another interface or an abstract class that implements an interface inherits all abstract methods Signup and view all the answers

What is the rule for defining an interface in Java?

An interface cannot be marked as final Signup and view all the answers

How many interfaces can a class implement in Java?

Two or more interfaces Signup and view all the answers

Study Notes

Interfaces in Java

An interface in Java is a collection of abstract methods and constants that can be implemented by a class.
The keyword interface is used to create and define an interface in Java.

Methods and Constants in Interfaces

Methods in interfaces are implicitly abstract and public, and constants are implicitly public, static, and final.
Methods and constants in interfaces are treated as abstract methods and public static final constants.

Instantiating an Interface

An interface cannot be instantiated directly in Java.

Inheriting an Interface

A class can implement multiple interfaces in Java.
When a class inherits an interface, it must implement all the methods of the interface.
A class can implement multiple interfaces and inherit their methods and constants.

Defining an Interface

The rule for defining an interface in Java is to declare all methods as abstract and all variables as constants.

Implementing Multiple Interfaces

A class can implement any number of interfaces in Java.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge of Java interfaces with this quiz! Explore the fundamentals, rules for defining and inheriting interfaces, and practical examples to solidify your understanding.