Consider an online holiday booking system. The users can register to book a holiday package, either as a family holiday or for adults only. The software des would like to apply the Gang of Four (GoF) factory method pattern to the system design. Which of the following should be implemented for the pattern? Select one: a. The Family Package and Adult Only_Package classes should implement the Package class. b. The Package class should implement the Factory class. OC. The Package class should implement the Family Package and Adult Only_Package classes. O d. The Factory class should implement the Package class.
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- Using UML class diagrams, create a design for the following (you can defer declaring the types for any instance variables and instance methods as long as you represent the concepts appropriately). NB: You may hand-draw your diagram or use a drawing program (your choice). Upload your finished answer for (a) and (b) as one file. (a) An Employer has one or more Employees. An Employee has exactly one Employer. Employees have attributes for their name, salary and job title (b) We are producing a vehicle registration system for the local DMV/RMV. Model the following using a UML class diagram. Read the entire specification before proceeding (this is ONE question, broken into 4 segments for readability): (i) Our interface (protocol/contract) IVehicle states that all vehicles can register() and calculateExciseTax(). These operations are public and the Vehicle contract is stable – it will not change. (ii) We think we’ll be able to take advantage of code-reuse, so your team must introduce an…Task description Describe an example scenario where it is applicable to use the composite design pattern. You should not use the assembly-part stock control scenario described in lectures. You can make use of other sources for scenario ideas, but you should reference them appropriately. Your answer should include the following: a) A description of the scenario and the relevant objects in it. b) A class diagram illustrating the use of the composite design pattern. c) A description, with code snippets, of an implemented solution to the scenario without using the composite design pattern. d) A description, with code snippets, of an implemented solution to the scenario using the composite design pattern, making reference to how the implementation in c) was adapted. e) Your answers to c) and d) should include a discussion of data structures used, any association, aggregation, or composition relationships, inheritance relationships, and the use of polymorphismWhen designing a class to be an Abstract Data Type, keeping the functions together with the data they operate on is an example of which is one of the pillars of object-oriented programming. Write your answer here.
- Question Two In the first task, it is necessary to model the classes and interfaces that are necessary to describe the simplified model of the music industry. Various bands (Band) are featured at concerts or festivals (Festival), which are characterized by their name and the members, or musicians (Musician). The code below needs to be updated to allow for the full functionality of the Main class, provided below. Assume that all getters and setters (for those variables that can be changed) are already written and you do not need to write them, and that the equals methods are overridden where they need to be. NOTE: The task should use the superclass constructor whenever possible, and respect the good practice of the object- oriented paradigm. public class Main { public static void main(String[] args) { Musician m1 = new Musician("Dave Grohl", "USA", 50, BandPosition.SINGER, 98); Musician m2 = new Musician("Pat Smear", "USA", 59, BandPosition.GUITARIST, 85); Musician m3 = new…To distinguish the purpose of the implementation from the data it utilizes, programmers construct a class. As a result, any data types may be handled by functions and classes. a document with headers a fictitious way a general design pattern for classesComplete the following class UML design class diagram by filling in all the sections based on the information below. The class name is CorporateBank, and it is a concrete entity class. It has one attribute BankCode as private integer and three (name, location, address) as private strings with initial null value. The attribute 'BankCode' has the property of “key”. Also provide at least two relevant methods for CorporateBank class. Class Name: Attribute Names: Method Names:
- You are asked to do a detailed design of part of a system using class diagram, modeling interactions and behaviour for a part of a library system. This part can be described as a use case: checkout an library item. In this use case, a librarian use the system to check out an item for a legitimate borrower. The system need to check the borrower’s record first and then update the library data, the borrower’s record etc. Identify the classes for this use case and use a state diagram to describe the behavior of the system (For example, when the system is checking the record of an item, it will not accept checking out the item.).Let's assume that you have been employed by a University to design Library Management System for the University. The following classes have been given to you to assist you create the class diagram. User Class – It manages all operations of user. Librarian Class – It manages all operations of Librarian. Book Class – It manages all operations of books. It is basic building block of system. Account Class – It manages all operations of account. Library database Class – It manages all operations of library database. Staff Class - It manages all operations of staff. Student Class - It manages all operations of student. Required You are required to create a complete class diagram.You are asked to do a detailed design of part of a system using class diagram, modeling interactions and behaviour for a part of a library system. This part can be described as a use case: checkout an library item. In this use case, a librarian use the system to check out an item for a legitimate borrower. The system need to check the borrower’s record first and then update the library data, the borrower’s record etc. Identify the classes for this use case and use UML to draw the classes with appropriate associations. You also need to identify necessary attributes and operations for each of the classes. Draw a detailed sequence diagram for this use case.
- Write a JAVA Scala class about an object oriented scenario with at least 2 functions in this class related to scenario where at least one function is a higher order function.Include your name in this class so it is identifiable. Example: CarsSaber In the main program, create at least 2 instances of the class and call the higher order function with an anonymous function. Dont write simple java program use SCALA CLASS Example is given belowA Person class has four attributes SSN, age, gender, and address. Normally, SSN and gender are not expected to be changed after the values are set for a person object. What design pattern can make this feasible?A Person class has four attributes SSN, age, gender, and address. Normally, SSN and gender are not expected to be changed after the values are set for a person object. What design pattern can make this feasible? Also, Show the UML class diagram for this Person class.