Custom Classes and Objects

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What is thepurpose of encapsulation?

To provide a global access to the variables
To allow the client to modify the values directly
To hide the internal workings of an object from the client (correct)
To make the object's variables protected

What is thevisibility modifier that allows the members of a class to be referenced anywhere?

Private
Public (correct)
Default
Protected

What is the purpose of a support method?

To create a new object
To modify the values of variables
To assist a service method (correct)
To provide services to clients

What is the outcome of declaring a variable with public visibility?

It violates encapsulation (A) Signup and view all the answers

What is the role of an object in encapsulation?

To manage its own state (B) Signup and view all the answers

Why should instance variables not be declared with public visibility?

Because it violates encapsulation (C) Signup and view all the answers

What is the purpose of an interface in encapsulation?

To define the services an object provides (B) Signup and view all the answers

What is the purpose of a client in encapsulation?

To request the services of an object (D) Signup and view all the answers

What is the difference between public and private visibility?

Private variables are accessible within the class, while public variables are accessible outside the class (A) Signup and view all the answers

What is the purpose of a modifier in Java?

To specify the characteristics of a method or data (C) Signup and view all the answers

What is the purpose of the protected modifier in Java?

To involve inheritance (D) Signup and view all the answers

What is the primary purpose of an accessor method?

To return the current value of a variable (B) Signup and view all the answers

What is the name of the method in the Die class that generates a new face value?

roll() (B) Signup and view all the answers

What is the purpose of the toString() method in a class?

To return a character string that represents the object (D) Signup and view all the answers

What is the name of the class that represents a bank account?

Account (C) Signup and view all the answers

What is the purpose of a driver program?

To test other parts of the software (C) Signup and view all the answers

What is the name of the method that adds interest to the balance of an account?

addInterest() (D) Signup and view all the answers

What is the purpose of a mutator method?

To modify the value of a variable (C) Signup and view all the answers

What is the scope of the instance data in a class?

Private (C) Signup and view all the answers

What is the purpose of the setFaceValue() method in the Die class?

To modify the face value within a particular range (A) Signup and view all the answers

What is the name of the class that drives the use of the Account class?

Transactions (B) Signup and view all the answers

What are the primary characteristics of an object in object-oriented programming?

State and behavior (D) Signup and view all the answers

What does a class serve as in software design?

A blueprint for an object (B) Signup and view all the answers

What is represented in a UML class diagram?

The class name, attributes, and operations (D) Signup and view all the answers

What is the scope of data declared at the class level?

In all methods of the class (C) Signup and view all the answers

What is instance data?

Data specific to each object of a class (A) Signup and view all the answers

What happens when a method is called?

The flow of control jumps to the method and executes its code (B) Signup and view all the answers

What is the purpose of a constructor in a class?

To set up an object when it is initially created (A) Signup and view all the answers

What is the return type of a constructor?

No return type specified (A) Signup and view all the answers

What happens to local variables when a method finishes executing?

They are destroyed (C) Signup and view all the answers

What is the purpose of a UML class diagram?

To show the relationships among classes and objects (C) Signup and view all the answers