3 (a) Use the class diagram to answer the below questions. The class diagram models a system for administering the photography competitions run by a camera club. Member Club name : String membershipNo : Integer Print Competition date : Date Entry abstracts entered title : String firstPrize secondPrize ColourPrint BlackAndWhitePrint Figure 1 a) How many classes are there? Nominate them. b) What kind of relationships are there between classes? Nominate the classes that are connected with certain relationship c) According to Pigure 1 is it possible for a given print to be entered for more than one competition? Explain your answer d) Interpret the association between Member and Club classes. Consider the following scenario: A university consists of several departments. Each department is identified by its name and location. Students are enrolled in different departments. Every student has a student id, student name, address and phone number. A student can be enrolled to exactly one department. A department can have one or more students. Identify classes, attributes, associations and multiplicities. Also draw a class diagram representing this scenario.

3 (a) Use the class diagram to answer the below questions. The class diagram models a system for administering the photography competitions run by a camera club. Member Club name : String membershipNo : Integer Print Competition date : Date Entry abstracts entered title : String firstPrize secondPrize ColourPrint BlackAndWhitePrint Figure 1 a) How many classes are there? Nominate them. b) What kind of relationships are there between classes? Nominate the classes that are connected with certain relationship c) According to Pigure 1 is it possible for a given print to be entered for more than one competition? Explain your answer d) Interpret the association between Member and Club classes. Consider the following scenario: A university consists of several departments. Each department is identified by its name and location. Students are enrolled in different departments. Every student has a student id, student name, address and phone number. A student can be enrolled to exactly one department. A department can have one or more students. Identify classes, attributes, associations and multiplicities. Also draw a class diagram representing this scenario.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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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.
Wire is used in the following applications. For each application, prepare a list of wire characteristics that are relevant, (1) create class diagrams with attributes (2) create associate objects with values for each class. Use the following wire applications: Each wire application should have a separate diagram layout. a. Selecting wire for a transatlantic cable b. Designing the electrical system for an airplane c. Hanging a bird feeder from a tree d. Designing a piano e. Designing the filament for a light bulb
3 (a) Use the class diagram to answer the below questions. The class diagram models a system for administering the photography competitions run by a camera club. Member Club 1 name : String membershipNo : Integer 1 Print «abstract» Competition date : Date Entry entered title : String 1 firstPrize 1 secondPrize ColourPrint BlackAndWhitePrint Figure 1 a) How many classes are there? Nominate them. b) What kind of relationships are there between classes? Nominate the classes that are connected with certain relationship c) According to Figure 1 is it possible for a given print to be entered for more than one competition? Explain your answer d) Interpret the association between Member and Cclub classes.
Complete the following • Joseph is a doctor. • He works at the Chris Hani Baragwanath Academic Hospital in Soweto. • He is responsible for the “Voice of Cancer Anti-Stigma Project”. Create a class diagram that will accurately depict the class described in the scenario above. Your diagram should demonstrate the following:• At least three attributes;• A getter and setter method for each attribute;• Access specifiers.
Class Employee Employee -Name (string) -ID(integer) -Address(string) -Salary(double) -Nationality(string) -ExtraWHours(int) +>( Name,ID) +void setdata( Address,Salary, ExtraWHours) 1. Regarding to the UML diagram create class Customer 2. Create the constructer Employee that read the Employee Name and ID and set the Nationality to Kuwaiti 3. Use the method setdata that set the remaining class data , this method verify that the number of extra working hours is greater than 5 to set the number to ExtraWHour otherwise set the number 1 + Overtime() to this data member + . get methods 4. create gets methods for all data member 5. calculate Employee overtime in Overtime method this method return double value after calculating the overtime by using the following formula Overtime = (Salary * 0.25)* ExtraWHours Test File 1. declare the object Employee1 with Name Fahad and id 7788 2. Ask the user to enter object data (Address, Salary, ExtraWHours) for the Employee1l objects 3. Set the data for…
Select the class relationship that best describes the following scenario: • Class A accepts an instance of Class B as a parameter in one of its methods. • Class A then uses one of the Class B's methods. Association (Reflexive) Association (Bidirectional) Association (Directed A to B) Association (Directed B to A) Composition (A as the whole and B as the part) Composition (B as the whole and A as the part) Aggregation (A as the whole and B as the part) Aggregation (B as the whole and A as the part) Inheritance None of the given
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.
With the aid of examples, demonstrate what you understand about a class and its instances.
9. Draw Class diagram for, customer order from a retail catalog. The central class is the Order. Associated with it are the Customer making the purchase and the Payment. A Payment is one of three kinds: Cash, Check, or Credit. The order contains OrderDetails (line items), each with its associated Item.
For the order system with two classes Customer and Order: • Draw a UML class diagram that shows the relations between following classes in the order system. class attributes operations SendOrder(orderNumber =or50) reciveOrder(orderNumber) PayBill(amount) name Customer class Name (string) Id (string) Address (string) Date (date) Number (string) customer order Class Order Confirm Close generatePayment completePayment() Billld(string) Amount (double) Payment class Payment A Customer will send / recive an order and pay a bill to recive an order An Order will generate a payment for the order. Draw a UML object diagram that shows the relations between object in the system. The system allows customers to send and receive orders. Model the interactions for the following: 1. A customer object C1 with the name : ahmad ,id:123 and address : xyz address sends an order O1 with the order id :1256. 2. A customer object C2 with the name : ali ,id:1234 and address : abc address receives an order 02…
For the order system with two classes Customer and Order: • Draw a UML class diagram that shows the relations between following classes in the order system. class attributes operations SendOrder(orderNumber =or50) reciveOrder(orderNumber) PayBill(amount) name Customer class Name (string) Id (string) Address (string) Date (date) Number (string) customer order Class Order Confirm Close generatePayment completePaymentt() Billld(string) Amount (double) Payment class Payment A Customer will send / recive an order and pay a bill to recive an order An Order will generate a payment for the order. Draw a UML object diagram that shows the relations between object in the system. The system allows customers to send and receive orders. Model the interactions for the following: 1. 1.ad IS 2. and addrone oho 3. A customer object C3 with the name : omar ,id:1235 and address : dnys address receives an order 05 with the order id :12115.
For the order system with two classes Customer and Order: • Draw a UML class diagram that shows the relations between following classes in the order system. class attributes operations SendOrder(orderNumber =or50) reciveOrder(orderNumber) PayBill(amount) name Customer class Name (string) Id (string) Address (string) Date (date) Number (string) customer order Class Order Confirm Close generatePayment completePaymentt() Billld(string) Amount (double) Payment class Payment A Customer will send / recive an order and pay a bill to recive an order An Order will generate a payment for the order. Draw a UML object diagram that shows the relations between object in the system. The system allows customers to send and receive orders. Model the interactions for the following: 2. A customer object C2 with the name : ali ,id:1234 and address : abc address receives an order 02 with the order id :1212. 3. A customer object C3 with the name : omar ,id:1235 and address : dnys address receives an order…