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Java Encapsulation MCQ - Multiple Choice Questions And Answers | JavaInUse

Java Encapsulation MCQ - Multiple Choice Questions And Answers

Q. What is encapsulation in Java?

A. It is a process of wrapping data and methods in a single unit
B. It is a process of defining multiple interfaces
C. It is a process of creating objects from classes
D. It is a process of establishing relationships between classes

Q. Which access modifier is used to restrict the access of a member to the same package?

A. private
B. protected
C. public
D. default

Q. Which keyword is used to create a constant variable?

A. static
B. final
C. abstract
D. constant

Q. Which access modifier is used to allow a member to be accessed from any class in any package?

A. private
B. protected
C. public
D. default

Q. Which keyword is used to inherit a class in Java?

A. new
B. create
C. extends
D. implement

Q. Which keyword is used to access the superclass members in a subclass?

A. super
B. parent
C. this
D. extends

Q. Which access modifier is most restrictive in Java?

A. private
B. protected
C. public
D. default

Q. What is abstraction in Java?

A. It is a process of hiding data and methods in a single unit
B. It is a process of defining multiple interfaces
C. It is a process of creating objects from classes
D. It is a process of establishing relationships between classes

Q. What is the purpose of encapsulation in Java?

A. To produce results
B. To consume values
C. To hide data and implementation details
D. To transform values

Q. Which access modifier is used by default for class members in Java?

A. private
B. protected
C. public
D. default





Q. What does encapsulation mean in Java?

A. 
Encapsulating code within a class to hide implementation details from other classes.
B. 
Encapsulating the main method within a class to restrict access to it.
C. 
Encapsulating the import statements within a class to reduce clutter.
D. 
Encapsulating variables within a class to make them accessible by other classes.

Q. Which access modifier is commonly used to encapsulate data in Java?

A. 
public
B. 
private
C. 
protected
D. 
default

Q. Which of the following is not a benefit of encapsulation in Java?

A. 
Improved code maintainability
B. 
Better data security
C. 
Flexibility in modifying implementation details
D. 
Faster runtime performance

Q. Which keyword is used to create a getter method in Java?

A. 
get()
B. 
return()
C. 
get
D. 
getVariableName()

Q. Which keyword is used to create a setter method in Java?

A. 
set()
B. 
return()
C. 
set
D. 
setVariableName()

Q. Which of the following is true about the concept of data hiding in encapsulation?

A. 
Data hiding refers to the practice of making data accessible to all classes in a program.
B. 
Data hiding refers to the practice of making data inaccessible to all classes in a program.
C. 
Data hiding refers to the practice of making data accessible to specific classes in a program.
D. 
Data hiding refers to the practice of making data accessible to all methods within a class.

Q. Which of the following is true about the concept of data binding in encapsulation?

A. 
Data binding refers to the practice of binding data to a specific class.
B. 
Data binding refers to the practice of binding data to a specific method within a class.
C. 
Data binding refers to the practice of binding data to a specific variable within a class.
D. 
Data binding refers to the practice of binding data to a specific object within a class.

Q. Which of the following is not an example of encapsulation in Java?

A. 
Using private variables in a class and providing public methods to access them.
B. 
Using access modifiers to control the visibility of variables and methods.
C. 
Grouping related variables and methods within a class.
D. 
Using static variables and methods to access data without instantiating an object.

Q. Which of the following is not a characteristic of encapsulation in Java?

A. 
Improved code organization and reusability.
B. 
Better control over access to data and implementation details.
C. 
Increased runtime performance of a Java application.
D. 
Enhanced code maintainability and flexibility.

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