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What is the purpose of a constructor in Java?
What is the purpose of a constructor in Java?
- To perform operations on variables within a class
- To call methods within a class
- To define static variables for a class
- To create and initialize objects (correct)
Why are the parentheses empty in a constructor declaration?
Why are the parentheses empty in a constructor declaration?
- To declare static variables
- To allow for multiple constructors with different parameters
- To indicate that the constructor takes no arguments (correct)
- To make the constructor private
What is the main difference between static variables and instance variables in Java?
What is the main difference between static variables and instance variables in Java?
- Static variables can be accessed only within the constructor, while instance variables can be accessed anywhere in the class
- Static variables belong to individual objects, while instance variables belong to the class as a whole
- Static variables are initialized by constructors only, while instance variables are initialized by methods
- Static variables belong to the class as a whole, while instance variables belong to individual objects (correct)
Which of the following best describes the role of a default constructor?
Which of the following best describes the role of a default constructor?
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Can a constructor have a return type in Java?
Can a constructor have a return type in Java?
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Which type of variable is shared by all objects of its class?
Which type of variable is shared by all objects of its class?
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How should static variables that are not constants be normally accessed or changed?
How should static variables that are not constants be normally accessed or changed?
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What keyword is used in the heading of a method definition to denote it as static?
What keyword is used in the heading of a method definition to denote it as static?
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When calling a static method, what should you use instead of the object name?
When calling a static method, what should you use instead of the object name?
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Can a static method reference an instance variable of its class?
Can a static method reference an instance variable of its class?
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