What is true about private fields of a class? They must be used with private methods. They are accessible from anywhere inside or outside of a class. They can never be used in a class. They can be accessed only by methods inside the class they are associated with. Which of these keywords is used to refer to a member of a base class from a subclass? power super this upper Which of the following is true about abstract classes? Note that if a class can be sub-classed, this simply means that it can be derived from. Abstract classes can only contain abstract methods. They cannot be sub-classed. Abstract classes cannot be instantiated, but they can be sub-classed. Abstract classes can only contain abstract methods. They can be sub-classed. Abstract classes can be instantiated, but they cannot be sub-classed.

Q: Design a Friend class that the following members: •A field for the name of the friend (a string).

A: Friend Class: public class Friend { //data fields private String name,cellphone; private…

Q: What is a characteristic of static members? O a. For every object created, there is only one field…

A: About Characteristics of static members

Q: True or False a. If you do not write a constructor for a class, java will supply a default…

A: The objective of the question is to determine the validity of several statements related to Java…

Q: Object passing checklist 1. Go over each member function and add the const keyword after their…

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Q: 1- Create a class SchoolKid that is the base class for children ar a school . It should have…

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Q: QUESTION 17 Which of the following are incorrect? (Choose all that apply) A. You may declare a final…

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Q: What is the difference between equals() and == ? == looks to see if they are identical objects…

A: Answers:   Difference between equal() and == :   == Is used for reference of the Comparison. equal()…

Q: When the inheritance is private, the private methods/functions in base class are in the derived clas…

A: When the inheritance is private, the methods/functions in base class are________in the derived…

Q: Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have default…

A: 1. The correct answer is option (B) A a = new B(); Explanation : Here A is an Abstract class and you…

Q: An unspecified data type can be used for both the parameters and the return type just for abstract…

A: All variables  must have a data type. So option 1,3, and 4 are incorrect

Q: What are the similarities between structs and classes? (Select all that apply)   - Private data…

A: Structures and classes are the two most important data structures that are used by programmers to…

Q: Which of the following statements are true. a) An abstract method contains a signature but no code…

A: 1) Abstract classes and methods are important concepts in object-oriented programming that help…

Q: 3. What is the difference between method overriding and method overloading?

A: 3. What is the difference between method overriding and method overloading? Method…

Q: Which one is true? A) An inner class can be declared public or private subject to the same…

A: All the statements are true. So option A,B,C,D are correct

Q: What is the purpose and benefit of private members in a class? Check all that apply. O Object data…

A: options a,b,d are correct we use private keyword for the purpose of private members in a class.…

Q: Person and Customer Classes The Person and Customer Classes Write a class named Person with data…

A: Person Class:Define a class called Person.Inside the class, define the __init__ method that takes…

Q: Question 2 Next you will need to create classes to implement the interface and extend the abstract…

A: class Circle extends AbstractShape{    private double m_radius;        //Constructor    public…

Q: Which of these statements IS NOT true regarding design by contract.   Question options:   Creating…

A: Thе question is asking which of the following statеmеnts is NOT truе rеgarding dеsign by contract.…

Q: Fill in the blanks in the following table which describesthe access levels in a derived class's…

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Q: Create a Car class in C++.that has the following: The class should contain the attributes of color,…

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Q: Design a class named Point that meets the following requirements: Two data fields x and y for…

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Q: For each statement, indicate if it is True or False by circling T or F. If you need to cross out an…

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Q: Which of the following is true about abstract classes? Note that if a class can be sub-classed, this…

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Q: The term "polymorphism" means: O A method can have multiple return types. A class can have multiple…

A: The suitable answer is (c).

Q: Design and implement a Restaurant class with at least three meaningful attributes and two methods.…

A: Below is the complete solution with explanation in detail for the given question about creating a…

Q: If a class needs to inherit from multiple parent classes, the parent classes must  a. be inherited…

A: Inheritance:- Inheritance is a concept in object-oriented programming (OOP) in which a class, called…

Q: Define a class named Employee. This class should extend the Person class from the previous question.…

A: Student requirement Definea class named Employee. This class should extend the Person class from the…

Q: Create a class SchoolKid that is the base class for children ar a school . It should have attributes…

A: The given below program is in java.

Q: Given the following definitions: public abstract class Manager extends Employee { ... } public class…

A: Introduction: Class is one of the concepts in the object-oriented programming paradigm and it’s…

Q: Create an abstract class Product  with following  Properties Price (Decimal), Code (string),…

A: NOTE - I have used the Java programming language. Here I have created all the classes and interface…

Q: Implement the Seller class as a derived class of Person class. Create the seller.h and seller.cpp…

A: The c++ program is given below:

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A: In this implementation, the variables for suit, face value, and isDrawn are made private because we…

Q: Select the answer that best describes the following statements: 1. Usage of static variables…

A: Introduction: Static Variable: Static Variable is a member variable of a given class which is shared…

Q: Given the following classes, answer the below questions.  Person (abstract class) that has the…

A: -----------------------------------------Person.java------------------------------------   public…

Q: How do we gain access to private attributes outside of the class they are defined?     Through…

A: Question 1 The correct answer is: Through public methods. In object-oriented programming, private…

Q: Which of the following are true? If we derive a class from an abstract class, we can…

A: Now, let's look at each of the statements:1. When we derive a class from an abstract class, we have…

Q: QUESTION 1 Static fields in a class O can be referenced as a field of any instance of the class. O…

A: The suitable option is (a).

Q: When would you be most likely to use an abstract class? when you need to derive a class from…

A: An abstract class is most likely to be used when a superclass is required that should be not be…

Q: ClassA + retrace(): void 1 > Retraceable + retrace(): void 1 ClassB + retrace(): void

A: Abstract class: The abstract class is declared with the keyword abstract. The abstract class can…

Q: Which of the following is true about abstract classes? Note that if a class can be sub-classed, this…

A: A class which is declared with the abstract keyword is known as an abstract class in java. It can…

Q: UESTION 16 What must be true of a class with one abstract method? O The class must also implement…

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Q: If the programmer doesn't declare any constructors for an extended class, what constructors will be…

A: by  bartleby guidelines i am able to do only first question.

Q: )When the inher C+). a. Inaccessible b.. Accessible

A: Explanation: When the inheritance is private, the private methods in base class are inaccessible in…

Q: Suppose we have an program which is a Human Resources system used to hire and track new employees.…

A: first name hire date birth date employee ID number

Q: True or False? Because child classes in generalizations inherit the attributes, operations, and…

A: Answer: Generalization is the most common way of extricating shared qualities from two or more…

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career. 

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is: