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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?
Can a constructor have a return type in Java?
Can a constructor have a return type in Java?
Which type of variable is shared by all objects of its class?
Which type of variable is shared by all objects of its class?
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?
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?
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?
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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