Starting out with Visual C# (4th Edition)
4th Edition
ISBN: 9780134382609
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 5SA
In what kind of situation would you want to use an abstract class instead of a base class?
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In what circumstances would you prefer to utilize an abstract class over a base class?
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Chapter 10 Solutions
Starting out with Visual C# (4th Edition)
Ch. 10.1 - In this section, we discussed base classes and...Ch. 10.1 - Prob. 10.2CPCh. 10.1 - What does a derived class inherit from its base...Ch. 10.1 - Look at the following code, which is the first...Ch. 10.1 - Briefly summarize the constructor issues in...Ch. 10.2 - Look at the following class definitions: class...Ch. 10.2 - Does the is a relationship work in reverse? Why or...Ch. 10.3 - What is the purpose of an abstract class?Ch. 10.3 - If a class is abstract, what cannot be done with...Ch. 10.3 - If a class is derived from a base class that has...
Ch. 10.3 - What must be done with an abstract property before...Ch. 10.3 - How can you create an abstract read-only property?Ch. 10 - When one object is a specialized version of...Ch. 10 - In an inheritance relationship, the_______ is the...Ch. 10 - In an inheritance relationship, the___________ is...Ch. 10 - Base classes are sometimes called____________. a....Ch. 10 - Derived classes are sometimes called______________...Ch. 10 - The refers to the base class. a. friend keyword b....Ch. 10 - Prob. 7MCCh. 10 - When a derived class method has the same name as a...Ch. 10 - The declares that a derived class is allowed to...Ch. 10 - The declares that this method overrides a method...Ch. 10 - A class that is not intended to be instantiated,...Ch. 10 - To declare a class as abstract, you use the...Ch. 10 - A regular, nonabstract class is sometimes called a...Ch. 10 - A(n) __________ is a method that appears in a base...Ch. 10 - A(n) __________ is a property that appears in a...Ch. 10 - __________ allows a base class reference variable...Ch. 10 - The base class inherits fields, properties, and...Ch. 10 - Polymorphism allows a class variable of the base...Ch. 10 - Properties in a base class cannot be overridden in...Ch. 10 - A base class reference variable can reference an...Ch. 10 - A statement that tries to use the new operator to...Ch. 10 - A class that is not intended to be instantiated,...Ch. 10 - When an abstract property appears in a class, it...Ch. 10 - What does a derived class inherit from its base...Ch. 10 - Look at the following code, which is the first...Ch. 10 - Can methods in the derived class directly access...Ch. 10 - When you create an instance of a derived class,...Ch. 10 - In what kind of situation would you want to use an...Ch. 10 - What is primary difference between an abstract...Ch. 10 - Can abstract classes also contain abstract...Ch. 10 - Write the first line of the definition for a...Ch. 10 - Look at the following class declarations: class...Ch. 10 - Write a parameterized constructor for a base class...Ch. 10 - Prob. 4AWCh. 10 - Create an abstract class called Star. Include an...Ch. 10 - Employee and ProductionWorker Classes Create an...Ch. 10 - ShiftSupervisor Class In a particular factory, a...Ch. 10 - TeamLeader Class In a particular factory, a team...Ch. 10 - Person and Customer Classes Design a class named...Ch. 10 - PreferredCustomer Class A retail store has a...
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- What are the advantages of utilizing interfaces as opposed to abstract classes?arrow_forwardWhat benefits or drawbacks does a derived class have over its base class?arrow_forwardA subclass must fully implement all of the abstract methods of its parent class in order to be considered a subclass of an abstract class. What are your thoughts on whether or not it should be done?arrow_forward
- Abstract classes and interfaces may be used interchangeably to specify the behavior of objects.How do you know whether you need an interface or an abstract class?arrow_forwardWhat effect does it have on a class's dependencies if it is called "incomplete" or "insufficient," which are two of the most important things about a well-designed class?arrow_forwardProgramming Launguage = Python 2. ShiftSupervisor Class In a particular factory, a shift supervisor is a salaried employee who supervises a shift. In addition to a salary, the shift supervisor earns a yearly bonus when his or her shift meets production goals. Write a ShiftSupervisor class that is a subclass of the Employee class you created in Programming Exercise 1. The ShiftSupervisor class should keep a data attribute for the annual salary and a data attribute for the annual production bonus that a shift supervisor has earned. Demonstrate the class by writing a program that uses a ShiftSupervisor object. Sample Output Enter the name: John Smith Enter the ID number: 234 Enter the annual salary: 100000 Enter the bonus: 10000 Shift supervisor worker information: Name: John Smith ID number: 234 Annual Salary: $100,000.00 Annual Production Bonus: $10,000.00 Combined Annual Pay: $110,000.00 NOTE: Add new calculation.arrow_forward
- What does an abstract class serve?arrow_forwardWe discussed in the class that during the design, you may need a class that serves as an interface for its derived classes, but you would not create any instance of that class. Such a class is called an abstract class. The UML class diagram shown below shows a class hierarchy starting from the Vehicle class which is an abstract class. Write a program to implement this class hierarchy such that the given code in the main function runs without error. Vehicle Bus Car Truck IntraCityBus InterCityBus int main() { Vehicle* V[] = { new Bus, new Car, new Truck, new IntraCityBus, new InterCityBus }; for (int i = 0; i < 5; i++) { cout<< V[i]->move() <<endl; } return 0; } Your program should produce an output as the following: Bus: Moves to carry a large number of people Car: Moves to carry a small number of people Truck: Moves to transport goods Intra-City Bus: Intra-City Bus: Moves to carry a large number of people between two areas of a city Inter-City Bus:…arrow_forwardIn-class Assignment Day 8 You should draw the hierarchy for your classes to understand how the coding should be structured. Be sure to notate any classes that are abstract. Write an abstract class for Shape. The intended subclasses are Polygon, Circle, Triangle, and Rectangle. All of these will have a name, an area, and a perimeter. (Consider which methods might be abstract.) Add a toString method that will return the information about the Shape, for example: Triangle, Area: 7.5, Perimeter: 12.0 Write the class Rectangle. A Rectangle is a Shape and should have a width and a height. When a Rectangle is outputted, it should read: Rectangle, Length: #, Width: #, Area: #, Perimeter: # Write the class for Circle. Every circle is a Shape that has a radius. Be sure to provide an accessor method (getter) for the radius. When a circle is outputted, it should read: Circle, Radius: #, Area: #, Circumference: # Write a TestShape class that has the main method, which creates…arrow_forward
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