Practice Why use Interfaces? - 2.3 | Chapter 12: Inheritance, Interface, and Polymorphism | ICSE Class 12 Computer Science
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Academics

Grades

Grade 8 Grade 9 Grade 10 Grade 11 Grade 12

Curriculum

CBSE ICSE IB
Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Professional Courses
Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

games
Typing
Memory
Math
English Adventures
Knowledge

2.3 - Why use Interfaces?

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take mock test.

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is an interface in Java?

💡 Hint: Think of it as a contract.

Question 2

Easy

Can a class implement multiple interfaces?

💡 Hint: Recall the definition of multiple inheritance.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is an interface in Java?

  • A class
  • A collection of abstract methods
  • A concrete implementation

💡 Hint: Consider what ‘abstract’ means.

Question 2

Is it possible for a class to implement more than one interface?

  • True
  • False

💡 Hint: Think about how different functionalities might be integrated.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Imagine you're creating a software application for an online store. Define an interface called 'Purchasable' with a method 'purchase()'. Implement this interface in classes 'Book', 'Electronics', and 'Clothing'. Describe how each class might behave differently when 'purchase()' is called.

💡 Hint: Think about the different purchasing processes for various item types.

Question 2

You are asked to improve the maintainability of an application by introducing interfaces. Current classes have tightly-bound dependencies. Explain how you would use interfaces to achieve this goal.

💡 Hint: Consider how you can decouple components in your system.

Challenge and get performance evaluation