Design a suitable Activity diagram with appropriate explanation based on the given case study: As a consultant, you are asked to design a class that handles login and security for an application. The basic functions of the class are: The user must first enter a valid login name. The system checks to see that the name is valid before asking for a password. If it is not valid, the user can either exit (cancel) or re- enter the name. The user then must enter the password associated with the name. The system validates that the password is the appropriate one for the login name. If the password is invalid, the user can either cancel and exit, re-enter the password, or go back to the first step and re-enter the login name. The user selects a function. The system validates that the function is one that the user is allowed to do. If not, the user can either exit, or enter a new function.
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- Consider an online holiday booking system. The users can register and log in to book a holiday package. The software development team is planning to apply the Gang of Four (GoF) Singleton pattern to the Security_Check class (as the Singleton class) which will monitor customers’ sign in activities. Which of the following is FALSE? Select one: a. The Security_Check class should provide a private method for the access of its object by external objects. b. The get method for the Security_Check object should be public. c. The Security_Check class should be responsible for creating one object to deal with different requests. d. The Security_Check class should have a private attribute for its object. I just need only the answerA system offers four service classes A, B, C and D, which differ in price tag and have a distinctive public method doA(), doB(), doC(), and doD(), respectively. These classes do share an identical public feature doCommon() method. The price attribute is private and is declared only once somewhere to be shared by all service classes. To use the system, a selected service is first paid for and the corresponding object is created to run the distinctive method and then the doCommon() method. Show the UML class diagram for the system. Extra interfaces, classes or methods can be added if needed then Redesign the system to solve the problem by calling a public method doJob() and utilizing polymorphism and dynamic binding to provide the distinctive service for a selected class. Extra interfaces, classes or methods can be added if neededIn the below sequence diagram which represents a use case for Search book, there are 5 objects from the five classes. Which classes are not entity classes and why?✓ Sadit Khan posted Mar 17, 2023 3:35 PM Subscribe Search Book: Use Case Search Page Search Results Page Catalog Search Results Customer -Main scenario- The Customer specifies an author on the Search Page and then presses the Search button. 1: on Search(author) The system validates the Customer's search criteria 1.1: validateSearchCriteria() alt, If author is entered, the System searches the Catalog for books associated with the specified author. author entered] 1.2 searchByAuthor(author) 1.2.1:create() When the search is complete, the system displays the search results on the Search Results page. -Alternate path- If the Customer did not enter the name of an author before pressing the Search button, the System displays an error message author not entered] 1.2.1.1: display() 1.3: display ErrorMessage()
- please I want a class diagram for university student club application. The application has the university clubs the user can search for any club they want to know about also the user can registor in the clubs through the application and of the user have any questions they can ask through the application. also there will be an inclination test the user can take to see which club is sutiable for them. Make sure that the class diagram is has all the components in the use case for our system. please I want the class diagram to be correct This is the use case diagram for our application please I want a class diagram for the application, and please I want the class diagram to draw it using an application not by hand pleaseQuestion: An object of class ReportEmergencyForm is created when object of ReportEmergencyControl sends the «create» message and is destroyed once the EmergencyReportForm has been submitted. In general, the second column of a sequence diagram represents the boundary object with which the actor interacts to initiate the use case (e.g., ReportEmergencyButton). The third column is a control object that manages the rest of the use case (e.g., ReportEmergency– Control). From then on, the control object creates other boundary objects and may interact with other control objects as well (e.g., ManageEmergencyControl). ? Create Collaboration diagram for the above described scenarioThis exercise will be about processing a collection of bank transactions using an iterator. A particular account owner may have multiple transactions. Assume a classed named BankXA that contains info about a customer's transaction. The class has 4 public attributes:string acctOwner //The name of the account's ownerstring xaDetail //some detail on the transactionstring type // assume the value will always be either "dep" for a deposit or "withd" for withdrawal, no other values double amt //the amount of the transaction. The amount will always be 0 or more Note that these attributes are public therefore you will NOT need setters and getters for this exercise. Your program will obtain a pointer to a list of BankXA. Your program must iterate the list using an iterator and the result must be like the following: J. Faune withdrew -$485.00 I. Boesky withdrew -$42885.50 J. Faune deposited +$2.50 Where J. Faune and I. Boesky are the acctOwners,the withdrew and deposited refer to the type "dep"…
- A User class has an association link to a Service class, and calls its compute() method to do mathematical calculations. Because the computation takes time, it is better to first prompt a waiting message, which was not yet provided, to inform the user. However, the Service class is also used by other internal classes that do not need the message. Therefore, your job is to come out a way to provide the message without modifying the association relationship and the code of the Service class. What design pattern is a useful choice? Also,Show the new design in UML class diagram. Extra interfaces or classes can be added.1.Write all functional requirements which are required to implement “Search a cab” use case. 2.Explore any two high priority quality attributes which are very important for “Get a cab” application with brief rationale. 3. Write all possible testable non-functional requirements for above explored quality attributes. 4.Draw a use case diagram for “Get a Cab” application ‘Get a Cab’ is a Smartphone application. It will search cabs for the passenger, provide them with security by reminding them about their luggage and it will also allow the user to inform the police with the help of a one-click button. This application facilitates the guardians to trace the location of their loved ones. It also lets passengers locate a driver at any instance to overcome all time related issues. If the passenger wants to avail the services of the same driver in future, he/she can add the driver to the favorite list, stored in the application. 5.Write a detail use case for “Search a Cab” function. For…This is the question - Create an abstract NewspaperSubscription class with fields for the subscriber name, address, and rate. Include get and set methods for the name field and get methods for the address and subscription rate; the setAddress() method is abstract. Create two subclasses named PhysicalNewspaperSubscription and OnlineNewspaperSubscription. The parameter for the setAddress() method of the PhysicalNewspaperSubscription class must contain at least one digit; otherwise, an error message is displayed and the subscription rate is set to 0. If the address is valid, the subscription rate is assigned $15. The parameter for the setAddress() method of the OnlineNewspaperSubscription class must contain an at sign (@) or an error message is displayed. If the address is valid, the subscription rate is assigned $9. Code I was given - public class DemoSubscriptions { public static void main(String args[]) { PhysicalNewspaperSubscription pnsGood = new…
- Two ways to get a "self" in an object are: a) (1) to use the closure + box with dummy value changed to the object trick, or (2) to pass in self as an implicit parameter, by passing a function that returns the object when given a 'self message b) (1) to add an else clause to dynamic dispatch or (2) to pass in self as an explicit parameter, using something like msg/self c) (1) to use the closure + box with dummy value changed to the object trick, or (2) to add an else clause to dynamic dispatch d) (1) to use the closure + box with dummy value changed to the object trick, or (2) to pass in self as an explicit parameter, using something like msg/selfYou are given the following class and the client class. Examine the code and provide the output of the client class. Explain the intention of the code and comment if the code output matches the intended use of the code. Explain any mismatch between intention and actual code output. Find the problem in this code and explain what you would do to solve the problem. The Person class is shown in the UML class diagram as follows. System.out.println("Name: System.out.println("Age: System.out.println("Weight: " + weight + " kg"); " + name);" + age + " years"); Person - name: String + setName(String newname): void+ getName( ): String+ writeOutput ( ): void+ equals (Person otherPerson): boolean /** This is the class that can be used for the client class */ public class Twin { private Person first, second; public Twin(Person firstPerson, Person secondPerson) {first = firstPerson; second = secondPerson; } public Person getFirst() { return first; } public…This programming problem consists of two parts and shall lead you through all the concepts involved in OOP Composition. Part 1: A class called Author (as shown in the class diagram) is designed to model a book's author. It contains: Three private instance variables: name (String), email (String), and gender (char of either 'm' or 'f'); One constructor to initialize the name, email and gender with the given values;public Author (String name, String email, char gender) {......}(There is no default constructor for Author, as there are no defaults for name, email, and gender.) public getters/setters: getName(), getEmail(), setEmail(), and getGender();(There are no setters for name and gender, as these attributes cannot be changed.) A toString() method that returns "Author[name=?,email=?,gender=?]", e.g., "Author[name=Tan Ah Teck,email=ahTeck@somewhere.com,gender=m]". Write the Author class. Also, write a test driver (for testing purpose on your local machine) called TestAuthor to test…