8.5 - Lifetime of Variables
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Practice Questions
Test your understanding with targeted questions
What happens to local variables after the method execution?
💡 Hint: Think about the scope of local variables.
Are instance variables lost when one object of a class is destroyed?
💡 Hint: Consider object-specific data.
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Interactive Quizzes
Quick quizzes to reinforce your learning
How long do local variables exist?
💡 Hint: Remember the scope of a method.
True or False: Instance variables are shared among all objects.
💡 Hint: Think about object-oriented principles.
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Challenge Problems
Push your limits with advanced challenges
Design a Java class that simulates an online shopping cart. Include instance variables for item names and quantities and a class variable for the total cost. Demonstrate adding items to the cart and show the memory footprint for each item added.
💡 Hint: Consider how each item impacts the total and instance variable life.
Create a mini-application that involves creating and destroying multiple cars. Show how instance variables of each car exist and get destroyed and monitor memory usage using an API.
💡 Hint: Use Java's memory management tools for tracking.
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