Assuming that you are developing software using OOP paradigm, specify the classes that are needed for the following systems: • Library Management System • Airline Management System • Hotel Reservation System For each system, you must identify at least 4 classes, and for each class, you must list data members and operations. Use the class diagram like the one below: Class Name Data members: Operations: Note: you need to have at least four class diagrams for each system. (Total of at least 12)
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- Computer Science Assume that you are given a concrete class A and are asked to write automated unit tests for it. In your own words. briefly explain what factors you would consider when deciding what classes/environment components/entities to mock when writing unit tests for A. You may use an example if you wish to.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…Object Oriented Programing Consider the following details of all classes in diagram A person can be an employee or a student. An employee may have rights of admin officer or of academic officer. These class hierarchies represent multi-level inheritance. However, a Dean or Head of Department(HOD) may have rights to modify the status already defined by an administrator academic officer. Implement all these classes with appropriate data members and proper suitable functions and within the main function, create instances of all classes and test the described working of all these classes.
- Implement all these classes while illustrating the concept of aggregation and composition in terms of ownership and life-cycle. Consider six classes i.e. Person, Department, Laboratory, and University having following specifications. Class University has Two attributes of type string i.e. universityName and location· An attribute named dept of type Department Class Department has Two attributes i.e. deptID, deptName· A two-argument constructor to initialize data fields with user-defined values· A member function display() to show all attribute values Class Laboratory contains Two attributes i.e. labID and experimentNo· A two-argument constructor to initialize data member with user-defined values Class Person has Two attributes i.e. name and age· A parameterized constructor to initialize attributes with user-defined values· A member function display() to show its attribute valuesT1. Define a possible scope for the following systems. First, list a wide range of things that thesystem could do. Then narrow down the scope. To do this, select a minimal set of the mostimportant features that you would implement in the first release of the system.(a) A police information system.(b) A system for real-estate agency.(c) A system for a public library.(d) A system for a car-rental agency.T2. Identify all the classes you can think of that might be part of the following systems, andchoose good names for them.(a) A restaurant reservation system.(b) A video rental store.(c) A system for a public library.(d) A video editing tool.T3. Apply the Abstraction-Occurrence pattern in the following situations. For each situation,show the two linked classes, the association between the classes, and the attributes in each class.(a) The issues of a periodical.(b) Models of electronic appliances and the individual appliances.8.8 LAB: Course information (derived classes) Use Java. Given main(), define a Course base class with methods to set and get the courseNumber and courseTitle. Also define a derived class OfferedCourse with methods to set and get instructorName, term, and classTime. Ex. If the input is: ECE287 Digital Systems Design ECE387 Embedded Systems Design Mark Patterson Fall 2018 WF: 2-3:30 pm the output is: Course Information: Course Number: ECE287 Course Title: Digital Systems Design Course Information: Course Number: ECE387 Course Title: Embedded Systems Design Instructor Name: Mark Patterson Term: Fall 2018 Class Time: WF: 2-3:30 pm import java.util.Scanner; public class CourseInformation {public static void main(String[] args) {Scanner scnr = new Scanner(System.in); Course myCourse = new Course();OfferedCourse myOfferedCourse = new OfferedCourse(); String courseNumber, courseTitle;String oCourseNumber, oCourseTitle, instructorName, term, classTime; courseNumber =…
- Q/// In this 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. The question: Write code in Java with all these classes implementation and a program called Polymorphism_works with member method…In what kinds of situations would you find it more beneficial to make use of an abstract class as opposed to a base class?You have three classes for each type of products. It is time to think about how to improve the data model – all three types have enough in common to be child classes of one parent class. Thus, the first thing to do is create a superclass and make three product type classes subclasses. Then, move as many members (fields and methods) from Type X, Y, and Z product classes to a superclass as possible. Change the constructors appropriately. The advantage of inheritance is the ability to create an array of superclass objects to be filled with objects of different subclasses. Thus, your inventory is in one array. Use the product’s index in the array to build the product’s ID (I would recommend starting with 1). In the superclass, create a static variable that holds the number of products available in the inventory. It must grow as reading from the file progresses.Override a default toString() method for a superclass such that it shows product ID, name, regular price, and type.At this moment,…
- In this 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. The question: Write code in Java with all these classes implementation and a program called Polymorphism_works with member method…We discussed in the class that during the design, you may need a class that serves as an interface for its derived classes, but you would not create any instance of that class. Such a class is called an abstract class. The UML class diagram shown below shows a class hierarchy starting from the Vehicle class which is an abstract class. Write a program to implement this class hierarchy such that the given code in the main function runs without error. Vehicle Bus Car Truck IntraCityBus InterCityBus int main() { Vehicle* V[] = { new Bus, new Car, new Truck, new IntraCityBus, new InterCityBus }; for (int i = 0; i < 5; i++) { cout<< V[i]->move() <<endl; } return 0; } Your program should produce an output as the following: Bus: Moves to carry a large number of people Car: Moves to carry a small number of people Truck: Moves to transport goods Intra-City Bus: Intra-City Bus: Moves to carry a large number of people between two areas of a city Inter-City Bus:…Problem description:1. Below are classes for a project that involves the creation, displaying andevaluation of a polynomial in x. Organize the classes into a project and test theprogram.2. Based on the project, create a project for the same purpose such thatcoefficients of polynomial may be numbers with decimal digits and that theliteral coefficient in each term must be consistent with the other terms (i.e. A term can be added in an existing polynomial only if the literal is the same asthe literal of the existing terms)./*** The following defines a term of an algebraic polynomial that involves only one* literal. 3x^2 is an example of a term where 3 is the coefficient, x is the* literal and 2 is the degree*/public class Term {private int coef; // data member to hold coefficient of a termprivate int degree; // data member to hold the degree of a termprivate char literal; // data member to hold the literal of a term/*** This a constructor that sets coefficient to 0, degree to 0 and…
