Practice Lifetime Of Variables (8.5) - Statements and Scope - ICSE 11 Computer Applications

Practice: Lifetime of Variables

Lesson 8.5Statements and Scope

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8 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
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What happens to local variables after the method execution?
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Think about the scope of local variables.
Question 2.
Are instance variables lost when one object of a class is destroyed?
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Consider object-specific data.
3Question 3.
How long do local variables exist?
- Until the method completes
- For the whole program
- Until the class is loaded
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Remember the scope of a method.
4Question 4.
True or False: Instance variables are shared among all objects.
- True
- False
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Think about object-oriented principles.
Question 5.
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.
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Consider how each item impacts the total and instance variable life.
Question 6.
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.
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Use Java's memory management tools for tracking.

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