Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
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.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is abstraction in Java?
💡 Hint: Think about what a user needs to interact with.
Question 2
Easy
Can you instantiate an abstract class?
💡 Hint: Consider how we use blueprints.
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 does abstraction help with in programming?
- Hiding details
- Debugging
- Optimization
💡 Hint: Think about the user interface.
Question 2
True or False: An abstract class can be instantiated.
- True
- False
💡 Hint: Recall how blueprints work.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design an abstract base class for a Shape with methods calculateArea() and draw(). Then create subclasses Circle and Square that implement these methods.
💡 Hint: Think about how each shape's area is calculated.
Question 2
Implement an interface Playable that has a method play(). Create classes VideoGame and Music that implement this interface and provide their own version of play().
💡 Hint: Consider what 'play' means in different contexts.
Challenge and get performance evaluation