Programming to an implementation (e.g. concrete types like Circle, Square, Triangle in an inheritance hierarchy) helps build decoupled designs that are easy to update/change. True/ False
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- Computer Science There are clearly some similarities in the implementations of Taxi and Shuttle that suggest use of inheritance to represent them. Introducing inheritance is the primary task of this assessment. -The Ezcab class, The Ezcab class maintains separate lists of taxis and shuttles and destinations with destination fares (you can hardcode destination fares). It has a lookup method that searches for a taxi/shuttle with a given ID. -The Taxi and Shuttle classes share some common attributes – location and destination. They also have some common methods – getLocation, getDestination, getStatus and setDestination. -Vehicle is the superclass of both Taxi and Shuttle. This class involves placing the common fields and methods into Vehicle and removing them from Taxi and Shuttle. -Modify Taxi and Shuttle class to indicate that it is a subclass of Vehicle. You can keep the id field in Vehicle class and getId,SetId methods. -Arrange for Taxi's constructor to call the constructor of…Write an abstract class, it can be anything well defined from the very basics.An unspecified data type can be used for both the parameters and the return type just for abstract classes (because they can not be instantiated) just for the signature of a method (i.e., the parameters) O just for the non-signature parts of the method (i.e., the return type)
- SOLVE IN C# Define a class Shape with an abstract method CalculateArea(). Define two additional classes for a triangle and a rectangle with fields width and height (values being set through appropriate constructors), which implement CalculateArea(). This method has to return the areas of the rectangle (height*width) and the triangle (height*width/2). Define another class for a circle with an appropriate constructor, which initializes the two fields (height and width) with the same value (the radius) and implement the abstract method for calculating the area. Create an array of different shapes and calculate the area of each shape in another array. helpInheritance is a white box approach to design where composition is black box. We want black box design if possible because it better decouples our code. We should thus favor composition over inheritance. True/FalseIn Java a class is allowed to inherit from as many superclasses as needed. True False
- Explain the different visibility modes in inheritance with an appropriate code.Design a console program that will print details of prescribed textbooks of students. Make use of an abstract class Book with variables that will store the author, title, category and price of a book. Create a constructor that accepts the author, title and category through parameters and assign these to the class variables. Create an abstract set method for the price of a book; also create get methods for the variables.Create a subclass TextBook that extends the Book class and implements an iPrintable interface. The interface that must be added is shown below:public interface iPrintable { String DisplayDetails();}The TextBook subclass has a private variable named yearPrescribed for which a get method must be written. The constructor of the TextBook class must accept the author, title, category and yearPrescribed through parameters. Write the code for the setPrice() and DisplayDetails() methods.Write a useBook class and instantiate 2 objects of the TextBook class.Write a C++ program for student’s evaluation concept using inheritance. Algorithm Step1: create a class studentpersonal declare rollno, age, name, sex in protected mode. Step2: Using a parameterized constructor initialize the values for all the data members. Step3: Create another class studentmark that is inherited from the baseclass and having the data members mark1 ,mark2 ,mark3,mark4 Using a parameterized constructor initialize the value for mark1,mark2,mark3,mark4. Step4: Create another class called studentsports and declare score as protected mode. Step5: Create a class studentresult and public inherited form studentmarks and studentsports having the data members total, avg, and grade. Step6: Calculate the total and avg and display the result.