Practice Declaration Of Variables (1.1) - Chapter 7: Variables and Expressions

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9 questions

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6 sample questions

Question 1.
What is a variable in programming?
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Think about memory and storage.
Question 2.
How do you declare an integer variable named 'number'?
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Remember the syntax 'data_type variable_name;'.
3Question 3.
What must you do before using a variable in Java?
- Declare it
- Initialize it
- Both
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Remember: You can't use it until it's declared!
4Question 4.
Is it true that instance variables are the same for all objects of a class?
- True
- False
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Think about how objects in Java work.
Question 5.
Write a program that demonstrates both local and instance variables. Explain what happens if you try to access a local variable outside its method.
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Pay attention to variable scopes.
Question 6.
Create a class with a static variable and demonstrate how it can be accessed from different instances. What happens when it is modified?
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Remember that static variables belong to the class.

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