What is a polymorphic data structure, and how does it work?
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What is a polymorphic data structure, and how does it work?
Choose one:
a.It is a data structure that stores instances of the same classes as data.
All classes that can be used for storing must have the same parent, and virtual methods are not allowed.
b.It is a data structure that stores instances of the same classes as data.
All classes that can be used to store data must have the same parent and must have virtual methods.
c.It is a data structure that stores instances of the same classes as data.
All classes that can be used to store data must have the same parent and can have virtual methods.
d.It is a data structure that stores instances of several classes as data.
All classes that may be used to store data must have the same parent and include virtual methods.
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- What is polymorphic data structure? Select one: a.It is a data structure which contains as the data the instances of same classes.All classes usable for storing must have the same parent and can't contain the virtual methods. b.It is a data structure which contains as the data the instances of same classes.All classes usable for storing must have the same parent and must contain the virtual methods. c.It is a data structure which contains as the data the instances of same classes.All classes usable for storing must have the same parent and can contain the virtual methods. d.It is a data structure which contains as the data the instances of different classes.All classes usable for storing must have the same parent and contain the virtual methods.Problem B Now we are going to use the design pattern for collecting objects. We are going to create two classes, a class AmazonOrder that models Amazon orders and a class Item that models items in Amazon orders. An item has a name and a price, and the name is unique. The Item class has a constructor that takes name and price, in that order. The class also has getters and setters for the instance variables. This is the design pattern for managing properties of objects. The setName() method should do nothing if the parameter is the empty string, and the setPrice() method should do nothing if the parameter is not positive. The class also has a toString() method that returns a string representation for the item in the format “Item[Name:iPad,Price:399.99]”. For simplicity, we assume an Amazon order can have at most 5 items, and class AmazonOrder has two instance variables, an array of Item with a length of 5 and an integer numOfItems to keep track of the number of items in the…Suppose that a class employeeType is derived from the class personType. Give examples of members—data and functions— that can be added to the class employeeType. Also write the definition of the class employeeType that you derived from the class personType, and the definitions of the member functions of this class.
- write a class implementation using C++ from the given class diagram TAKE NOTEOF THE FF SPECIFICATIONS: Using the constructor, create three objects from class Voters and store it in the stack memory. Two voters must have an active account and one voter has a deactivated account. Please note that the deactivated voter account must be still part of the “object”. Test all the functions by making calls. this should be the sample result. Please use simple codes only.Explain why it is preferable to have accessors to private types rather than making the types public, keeping in mind the three reasons that are given below.This lab will exercise your understanding of some of the concepts covered in Chapter 13:overloading operators 1. Create a class, name of your choice, to represent a college class in which students might register. a. Create three private member variables:Class Name (to hold values such as CSC210)Number of StudentsClass Hours b. Overload the >> operator to input, from cin, into the class object, the Class Name and Class Hours c. Overload the << operator to output all the private member variables d. Overload the + (plus) operator to add a value to the Number of Students private member variable.This will represent students registering for the class. e. Overload the - (minus) operator to subtract a value from the Number of Studentsprivate member variable. This will represent students dropping the class. f. The default constructor should initialize the private member variables appropriately. 2. Write a client program to: a. Upon program execution, create one class object that…
- Computer Science Create an inheritance hierarchy of Rodent: Mouse, Gerbil, Hamster, etc. In the base class, provide methods that are common to all Rodents, and redefine these in the derived classes to perform different behaviors depending on the specific type of Rodent. Create an array of pointers to Rodent, fill it with different specific types of Rodents, and call your base-class methods to see what happens. Write a small program to show the difference between calling a virtual function inside a normal member function and calling a virtual function inside a constructor. The program should prove that the two calls produce different results.Answer this qustion with refer to the part 1 and part 2 codes only an eample how to write in pic: In this and final part of the course work you are required to change the definition of the Item_in_Stock class to make it an abstract class and change the getItemCat(), getItemName() and getItemDescription() definitions to make them abstract methods. You are then required to design and implement three classes which are derived from Item_in_Stock class to fully demonstrate the concept of inheritance and polymorphism. Implementation of HP_Laptop class in part II should have given you an idea of inheritance and polymorphism. Three sub classes, one class against each category (Computers, Laptops and Accessories), should contain appropriate constructors, instance variables, setter and getters methods and overridden methods for getItemName(), getItemDescription() and get_Item_details() method. You should be creative and come up with your own ideas of sub-classes. Task 3.1. Draw a UML class…1 You have studied encapsulation and inheritance that are two important concepts of Object- Oriented Programmin and write a program of your own choice in it that can explain these concepts, and in the context of that program.And Also write the main method that can test the classes. write your answer below that will explain 1. How encapsulation and inheritance was achieved in this program? 2. What are the benefits you get after implementing encapsulation and inheritance in this program? 3. What are the disadvantages if you will not use encapsulation and inheritance in this program?
- write a class implementation using C++ from the given class diagram TAKE NOTE OF THE FF SPECIFICATIONS: Using the constructor, create three objects from class Voters and store it in the stack memory. Two voters must have an active account and one voter has a deactivated account. Please note that the deactivated voter account must be still part of the “object”. Test all the functions by making calls. this should be the sample resultconstruct a class implementation through C++ from the given class diagram TAKE NOTE OF THE FF SPECIFICATIONS: Using the constructor, create three objects from class Voters and store it in the stack memory. Two voters must have an active account and one voter has a deactivated account. Please note that the deactivated voter account must be still part of the “object”. Test all the functions by making calls. this should be the sample result(Hand Written Submission) Question # 1 a) What is the difference between an interface, class and an instance of the class?b) Is it a good idea to make member variables private? Why or why not?c) What is a constructor? Is it possible to have more than one constructor?d) What is the difference between static data member and an instance data member?e) What is the difference between composition and aggregation? Question # 2 Write a program to model the kinds of people one finds in a university. The categories are students,teachers and teaching assistant (TAs). All these categories are kinds of Person (Person is abstract class. Ateaching assistant (TA) is a student and a teacher as well.A person has a name (string). A student has grade point average GPA (between 0 to 4), the teacher hasthe number of scholarly papers he/she has published and the teacher assistant has the number of courseshe/she assists.All the classes contain constructors with default arguments to fill all data…
