Examine these two diagrams; true or false? a) The right diagram has more information b) The left diagram has more information c) They are equivalent, but the right one is simpler d) They are equivalent, but the left one is simpler
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- At what time(s) can a class diagram change? How is it changed?"Drawn from a conceptual perspective. Good way to build up a rigorous vocabulary of the domain" describes...* class diagram use case diagram activity diagram state machine diagramTask 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 polymorphism
- 4. Defne Use case diagram and its elements. Draw use case diagram for the class attendance system.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…Create a class diagram for the Indiana University library.The Indiana University library has books, journals, and the daily newspaper. These are the things from the library. Every piece of library material is labeled with an id number and a title. Only books are available for loan to Indiana University students and faculty members, out of the whole collection. Staff members can borrow periodicals to use for their research projects. IU users (staff and students) who wish to borrow books must have their ID cards scanned by the librarian, who must then keep track of the borrower's ID, the loan date, and when the book is due back. The library keeps track of the names, ID numbers, and phone numbers of its patrons. Every user is issued a library card. Create a class diagram based on the information provided above. Please make sure that you display traits, multiplicities, and relationships when applicable.
- By using Creately tool, draw the class diagram corresponding to the following scenario:• Each university has one or more department• Each department has a chairperson which is a lecturer and surely it assigns others• Each course object maintains a list of the students on that course and the lecturer who has beenassigned to teach that course• The course has behaviour that allow the adding and removing of students from the course,assigning a lecturer, getting a list of the currently assigned students, and the currently assignedlecturer.• The “taughtBy” relationship shows that a Course only has a single lecturer, but that a lecturermay teach several Courses.• Each Lecturer object also maintains a list of the Courses that it teaches.• There is a similar relationship between Course and Student. A course is attended by zero ormore Students, and a Student may attend multiple courses.• Both Lecturer and Student are shown to be types of Person.Object Oriented Analysis Systems Creating a complete class diagram for the "Housekeeper service system" if given you an overview of the classes, attributes, and associations you would need: 1. *User* - Attributes: name, password, mobile phone, email - Methods: updatePassword(), updateMobilePhone() 2. *System Administrator* - Inherits from User - Attributes: level Of Access - Methods: registerWorker(), registerCustomer(), updateServices(), addOffers() 3. *Worker* - Attributes: age, nationality, specialty, evaluation degree - Methods: displayAssignedVisits(), submitLeaveOfAbsence() 4. *Customer* - Inherits from User - Attributes: nationality ID, addresses - Methods: selectServices(), chooseVisitTime(), confirmServiceInformation(), makePayment(), getTransactionInformation() 5. *Address* - Attributes: street name, building number, zip code, city - Methods: addAddress(), deleteAddress(), updateAddress(), setDefaultAddress() 6. *Payment* - Attributes: transaction…1. Suppose the system is implemented by Java. Describe how Java changes the state from Open to Closed. 2. Explain the meaning of requestToRegister(aStudent)/createRegistration. 3. In some cases, a course need to be canceled even enough students have registered. Does this state diagram can handle that? If it cannot, then how to change the diagram to handle it?
- Design and implement a java program for the above class diagram. Here, you haveto calculate the compound interest for saving accounts (3.2% per year). As youknow, the user should not be able to withdraw money from a savings account but canwithdraw from the current account. The user should maintain a threshold in the currentaccount. If it goes below, the bank will charge some penalty. The tasks area. User can deposit, update, display the balance from both accounts (Savingsand current)b. Calculate interest and sum to savings accountc. Allow to withdraw only in current and goes below some level, charge apenaltyThe following is a Design Patterns: Singleton Pattern project with this UML class diagram. Please explain the UML class diagram as shown in image:Create your own UML diagram — similar to the above UML diagram — for a Pet class that meets thespecification below.1. Create the fields indicated below. Use these names exactly as given for your fields. Define them inexactly this order.• name — The name of the pet, e.g., “Rufus”, “Mittens”, “Smelly”, etc.• animal — The type of pet, e.g., “dog”, “cat”, “asparagus”, etc.• age — The (integer) number of years the pet has been alive, e.g., 1, 2, 3, etc.2. Create a mutator for each of the above in the order listed. Use the standard Java naming conventionfor mutators.3. Create an accessor for each of the above in the order listed. Use the standard Java naming conventionfor accessors.Example: Suppose you are taking the question for the example Car UML above instead of your Pet UML.Don’t enter any spaces at all.When the question asks: Enter line 1:You would enter: CarWhen the question asks: Enter line 2:You would enter: -make:StringWhen the question asks: Enter line 3:You would enter:…