Practice Lifetime Of Instance Variables (8.5.2) - Statements and Scope

Practice: Lifetime of Instance Variables

Lesson 8.5.2Statements and Scope

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
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6 sample questions

Question 1.
What is an instance variable?
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Think about what happens when you create multiple objects from the same class.
Question 2.
What does the garbage collector do?
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Consider how it helps manage memory automatically in Java.
3Question 3.
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.
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Remember that instance variables are linked to their respective objects.
4Question 4.
True or False: Instance variables are shared between all instances of a class.
- True
- False
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Think about how class instances operate independently.
Question 5.
Design a class 'Book' with instance variables for title and author. Create multiple instances and demonstrate how to manage their lifetimes effectively.
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Think about where you might store and subsequently discard references.
Question 6.
Explain how the garbage collector works, providing examples of how it could affect program memory during execution.
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Consider how recycling of memory aids in performance.

5 more questions in this section. Enroll free to practise them all.