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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is an instance variable?
💡 Hint: Think about what happens when you create multiple objects from the same class.
Question 2
Easy
What does the garbage collector do?
💡 Hint: Consider how it helps manage memory automatically in Java.
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 happens to instance variables when the object they belong to is destroyed?
- A) They are preserved.
- B) They are destroyed.
- C) They become class variables.
💡 Hint: Remember that instance variables are linked to their respective objects.
Question 2
True or False: Instance variables are shared between all instances of a class.
- True
- False
💡 Hint: Think about how class instances operate independently.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a class 'Book' with instance variables for title and author. Create multiple instances and demonstrate how to manage their lifetimes effectively.
💡 Hint: Think about where you might store and subsequently discard references.
Question 2
Explain how the garbage collector works, providing examples of how it could affect program memory during execution.
💡 Hint: Consider how recycling of memory aids in performance.
Challenge and get performance evaluation