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Questions and Answers
What is the main purpose of encapsulation in object-oriented programming?
What is the main purpose of encapsulation in object-oriented programming?
- To directly store objects in variables
- To display the structure of a class in UML diagrams
- To combine data and actions into a single unit (correct)
- To make all methods public for easy access
Which method should be used in Java for comparing two objects of a class type?
Which method should be used in Java for comparing two objects of a class type?
- equals() method (correct)
- == operator
- compareTo() method
- equal() function
What does a private method in a class prevent from happening within the class?
What does a private method in a class prevent from happening within the class?
- Changing the data stored in private instance variables
- Invoking methods in other classes (correct)
- Creating UML Class Diagrams
- Accessing private instance variables
In Java, what is stored in a variable of a class type?
In Java, what is stored in a variable of a class type?
What are class types in Java considered as?
What are class types in Java considered as?
What is the purpose of using the void keyword in a method declaration?
What is the purpose of using the void keyword in a method declaration?
What is the difference between a parameter and an argument in a method?
What is the difference between a parameter and an argument in a method?
Why must the data type of the return value match the declared return type in a method?
Why must the data type of the return value match the declared return type in a method?
What do local variables refer to in Java programming?
What do local variables refer to in Java programming?
Why is information hiding important in object-oriented programming?
Why is information hiding important in object-oriented programming?
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