Practice Variables (1) - Chapter 7: Variables and Expressions

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8 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
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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 is a variable in programming?
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Think about what it means to store something in a box.
Question 2.
Write the declaration of an integer variable named number.
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You need to specify the data type first.
3Question 3.
What does the keyword 'static' indicate in a variable declaration?
- It creates a new instance
- It shares the variable among all instances
- It makes the variable private
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Think about how instances interact with class members.
4Question 4.
True or False: Instance variables are shared among all instances of a class.
- True
- False
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Consider if multiple objects can share something.
Question 5.
Create a Java program that uses all three types of variables (local, instance, and static) and demonstrate their usage.
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Think about how to use these variables to store and manipulate data across methods and instances.
Question 6.
Write a code snippet that shows the difference in memory usage between a primitive and non-primitive variable.
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Refer back to how data types affect memory allocation.

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