Specify the read and write rights in the following access control matrix for a system that consists of 3 subjects and 3 objects to be enforced by the Biba model. If no right is allowed, specify "-" in the entry. Top secret Secret Confidential Top secret Secret Unclassified
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- 20. Consider the UML diagram below. It shows (1) a client class (Advisor), (2) a superclass (Student) used by the client (Advisor), and (3) a child class (UndergradStudent) of the Student class. What do you have to change in each of the three classes if you change the following: The public behavior of the Student Class by changing their access designators. Assume the public behavior of the Student Class was used by the Advisor class and the UndergradStudent class before the Student class was changed and the changes you now make will ensure that all three classes will continue to work after your added changes. Advisor Student UndergraduateStudentObject 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…Disciple-the uniform application of rightful behavior Explanation; Ex;
- Given the following legal UML class diagram (role names and multiplicities are on the association), is the following statement true or false? See Image to answer the following: A) A Child can have 3 biological parents: True or Flase? B) To be a BiologicalParent, you must have at least 1 child: True or Flase?Every company having customers maintains customer accounts and supports a complete life cycle of the account from its creation until it is closed. There are differences in what are the stages (states) in the account's life cycle, and what are conditions or events causing account to change its state.For the user account to be created, it has to meet some initial requirements. For example, user id (used as a login name) must be unique, at least for the existing accounts. After account was created, it might need to be verified. Verification depends on the company and could include e-mail, phone, and/or address verification. If account was not verified during some predefined period of time, that account could be moved to the suspended accounts. New, active, or suspended accounts could be cancelled at any time by client's request. Note, the precondition for this usually includes payment of any outstanding balances, and might require some separate account state or substate to handle this…Computer ScienceQuestion: Draw a sequence diagram to illustrate the interaction that takes place between the Client, the TumbleDryer and Bosch objects, and System.out when the describe() message is sent. You will need to read through the code of the TumbleDryer and Bosch classes to trace the sequence. The sequence diagram should be in this format like the diagram below. Client Class public class Client { public static void main(String[] args) { Implementation impl1 = new Bosch(); Appliance apl1 = new TumbleDryer(impl1); apl1.describe(); } } Appliance Class public abstract class Appliance { Implementation impl; public Appliance(Implementation impl) { this.impl = impl; } public abstract void describe(); } Washing Machine Class public class WashingMachine extends Appliance { public WashingMachine(Implementation impl) { super(impl); } public void describe() { System.out.println("Washing Machine");…
- 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.Overview: The Observer Design Pattern is a way to design a subsystem that allows many objects to respond automatically to changes of a particular object that's being "observed". Task: Let's say that we have a bank system and this is a main branch (observed class) and there are three branch of bank (concrete class) where is notification supposed to receive by each of those branch notifySubscribers() method. Objectives: • Create a Class UML Diagrams using the Design Patterns showing the Observer Design Pattern. In java code, Create classes and all attributes and methods for the classes.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. Show the UML class diagram for this Person class.
- 3.1 Explain the difference between a link and an association? 3.2 Describe the following class stereotypes, and explain why it is necessary to distinguish among them. Boundary classes, control classes and entity classes? 3.3 Explain the nature and importance of encapsulation in object oriented programming? 3.4 What are the benefits of keeping all classes reasonably small and self-contained?2. Generate a BLP lattice structured system where the objects and subjects are appropriately levelle to give access consistent with the access control matrix below. You need to describe the process b which you obtain your lattice. R and W correspond, respectively, to read and append. You are t use only the mandatory BLP rules, and a default allow in place of the discretionary rule. Be sure t add a level as necssary to ensure this is a lattice. 0₁ 0₂ R S₁ R 03 04 R R W S₂ R S3 R RW RW S₁ R S5 R S6 R R R 1 R 05 06 Ꭱ ] ᎡᎳ W W W R 3. For the following collection of statements, describe the sets of actions, objects, and subjects; an draw an access control matrix to represent the scenario. W W Alice can climb trees and eat apples. Bob can climb fences, eat apples, and wave flags. Trees can hurt apples. Carol can jump waves and wave flags.Write PHP snippets to show how a trait called RetrieveGeneratedErrors can be used by abstract classes LogManager and Validator to implement the abstract method getErrorMessages() that retrieves the error messages generated by LogManager and Validator objects.