Consider an online holiday booking system and the User class in the design. In an object-oriented design, which of the following method is used to create an object from the User class? O a. Set method O b. Get method OC. Constructor method d. Class method

Consider an online holiday booking system and the User class in the design. In an object-oriented design, which of the following method is used to create an object from the User class? O a. Set method O b. Get method OC. Constructor method d. Class method

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter11: More Object-oriented Programming Concepts

Section: Chapter Questions

Problem 7RQ

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What is the design pattern depicted in the diagram below? The intent of this design pattern is to define an interface for creating an object, but let subclasses decide which class to instantiate. It lets a class defer instantiation to subclasses. Client Abstraction normalMethodoe BmakeObjecto Product do some stuff aProduct = makeObjecto: f do some more stuff -aProduct Product ConcreteOne ConcreteTwo makeObjecto : Product ProductOne ProductTwo return new ProductOneo. A. Factory Method Design Pattern B. Singleton Design Pattern C. Proxy Design Pattern D. Adapter Design Pattern
Consider an online holiday booking system. The users can register to book a holiday package. Currently, the design model includes the classes: User and Booking. Assume the class, Group_Booking, is a sub-class of the class, Booking. Which of the following cannot be inherited by the Group_Booking class in the object-oriented design? Select one: O a. The protected attributes of the Booking class O b. The protected methods of the Booking class O C. The constructors of the Booking class O d. The public methods of the Booking class
An interface can have : instance variables. only method headings without implementation. some methods with implementation. only one constructor.
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Encapsulation is one of the fundamental concepts in object-oriented programming. It is also often used to hide the internal representation or state of an object from outside. This is called information hiding. By using the data in Figure 1, show your investigation if hacker try to approach to gain access to the code of your bank account. class Account { private int account_number; private int account_balance; public void show Data() { //code to show data public void deposit(int a) { if (a < 0) { //show error } else account_balance = account_balance + a; Figure 1: Account class
Consider an online holiday booking system. The users can register to book a holiday package. Currently, the design model includes the classes: User and Booking. Assume the class, Group_Booking, is a sub-class of the class, Booking. Which of the following cannot be inherited by the Group_Booking class in the object-oriented design? Select one: a. The constructors of the Booking class O b. The protected attributes of the Booking class O c. The public methods of the Booking class O d. The protected methods of the Booking class
JAVA A company needs to develop an object-oriented library with a few Java classes forthe following task. Overall, they want the classes to model the geometric shapes and calculatetheir areas. These geometric shapes include Square, Rectangle, Circle, and Triangle.The above four shapes share common attributes such as name and color. The area of a shapecan be calculated by using a method area( ) which can be implemented only until the exactshape is known. Different shapes need a different area( ) method.1) Design a Java abstract class called Shape to model this situation, which will serve as a parentclass. Write its code;2). All the above shapes should be drawable by the users by calling the draw( ) method.Different shapes are drawn differently. You should design a Java interface named Drawableto provide this method for the shape classes to implement in their own ways. Write its code;3). Write the code for the four classes: Square, Rectangle, Circle, and Triangle.Note:• You should decide…
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Consider an online holiday booking system. The users can register to book a holiday package. Currently, the design model includes the classes: User and Booking. Which of the following is correct regarding the message passing between a User object and a Booking object in the object-oriented design? Select one: O a. A Boolean value will be automatically returned to the Booking object which sends the message. O b. A value will be assigned to the attribute of the Booking object associated with message. O C. The attribute of the Membership object associated with message sent by the User object will be initialised. O d. The method of the Membership object associated with the message sent by the User object will be invoked.