Assume that we have four classes: Person, Teacher, Student, and PhDStudent. Teacher and Student are both subclasses of Person. PhDStudent is a subclass of Student. A.Which of the following assignments are legal, and why or why not? Person p1 = new Student(); Person p2 = new PhDStudent(); PhDStudent phd1 = new Student(); Teacher t1 = new Person(); Student s1 = new PhDStudent(); Suppose that we have the following legal declarations and assignments: Person p1 = new Person(); Person p2 = new Person(); PhDStudent phd1 = new PhDStudent(); Teacher t1 = new Teacher(); Student s1 = new Student(); B.Based on those just mentioned, which of the following assignments are legal, and why or why not? s1 = p1; s1 = p2; p1 = s1; t1 = s1; s1 = phd1; phd1 = s1;

Q: Please written by hand solution In a particular factory, a shift supervisor is a salaried employee…

A: The ShiftSupervisor class inherits the __init__ method from the Employee class using the super()…

Q: Define a class based on the UML class diagram according to your NSU ID. Choose NewDate If your…

A: import java.util.*;public class MyDate implements Comparable<MyDate>,Cloneable{    private int…

Q: Select one: a.Friendship between classes is symmetric b.Friendship between classes is neither…

A: Explanation: A) friendship is not symmetric. so option a is false B) friendship between classes are…

Q: 4. Draw the ontology for the given information: a) Pizza is a subclass of edibleThing . b) We have…

A: Ontology:

Q: Now write a test program that performs the following tasks: 1. Create a Faculty object with an id of…

A: A Computer Program is a set of instructions , that can be executed by a computer to perform a…

Q: Consider a Person class (which keeps track of a Person’s name) and a Student class (which keeps…

A: OOP or Object-Oriented Programming is a software model that is designed around data or objects…

Q: For this problem you are to join the following classes into a hierarchy (use the UML diagrams from…

A: Introduction Super Class: In object-oriented programming, a superclass is a class that is inherited…

Q: user + Username:String + Password:String +Contact int Super user + getuserName() +…

A:

Q: Define a Course base class with attributes number and title. Define a print_info() method that…

A: Required:   Define a Course base class with attributes number and title. Define a print_info()…

Q: Regarding the information hiding principle; A: Briefly describe it. B: State the advantages. A: How…

A: While doing programming in any programming language, you need to use various variables to store…

Q: From the problem description below, identity the most viable classes you will need to create an…

A: 1. Define Classes:Define classes for SalonService, Appointment, Customer, and Membership.Each class…

Q: What is the type of relationship between class StudentId and class Student? Expain the relationship…

A: Given: class StudentId {     private String idNumber;     private String bloodGroup;     private…

Q: Question 9 3 pt Continuing the question with the UML class diagrams for classes A, B, C, and D.…

A: Answer

Q: Q1: Consider a class network of the following figure. The class Result derives information from two…

A: Note :- You have not mentioned the language of the program so, i'm answering your question in C++…

Q: Consider the PlayingCard, Rank and Suit classes.            a)Which two classes are instance…

A: Given classes: PlayingCard Rank Suit 1. From the given class diagram, we can say that the two…

Q: List the classes that would be involved in the use cases and decide which class should be…

A: List the classes to “ Record the traffic ticket ” use case:

Q: Consider the following scenario of a class Person.

A: Consider the following scenario of a class Person. Yes, the destructor within the base class Person…

Q: Which OOP concept best illustrates the connection between the classes Nation and President, in which…

A: the OOP concept of composition best illustrates the connection between the classes Nation and…

Q: Consider the following scenario of a class Person. A Person class has a Name, ID, Address and has…

A: Program Approach: Create classes and add fields and methods into them. Use colon to inherit classes.…

Q: Consider the following scenario of a class Person. A Person class has a Name, ID, Address and has…

A: Actually, program is a executable software that runs on a computer.

Q: Given the three classes 'woman', 'mother' and 'parent', which one of the following is correct:…

A: Correct Answer: C

Q: Q1: Consider a class network of the following figure. The class Result derives information from two…

A: Note :- You have not the language of the program so. i'm answering your question in C++ language.…

Q: Problem 3: What is the relation between Employee Class and Lawyer Class? What does super do in the…

A: Employee class is the super class of Lawyer and Lawyer class is derived class of Employee class.…

Q: Consider the following scenario of a class Person. A Person class has a Name, ID, Address and has…

A: Required: To Write the main and construct objects of each class. Call class-specific functions for…

Q: Please nowwww

A: As per the requirement program is completed. Note: Here Employee.java and EmployeeTestFile.java both…

Q: Assume that we have four classes: Person, Teacher, Student, and PhDStudent. Teacher and Student are…

A: A)  Person p1=new Student(); -- It is legal This is valid as Person is a parent class of students.…

Q: A. Write the code of the class for the following UML diagram. Person -name: String -age: int +Person…

A: //class Personclass Person{ //declare variables String name; int age; public //parameterised…