Consider the following class hierarchy: Which of the following code fragments is NOT valid in Java?
A)Vehicle myAuto = new Auto("sedan");
B)LandVehicle myAuto = new Auto("sedan");
C)Auto myAuto = new Auto("sedan");
D)LandVehicle myAuto = new Vehicle("sedan");

Question

Consider the following class hierarchy:  Which of the following code fragments is NOT valid in Java? 
A)Vehicle myAuto = new Auto("sedan"); 
B)LandVehicle myAuto = new Auto("sedan"); 
C)Auto myAuto = new Auto("sedan"); 
D)LandVehicle myAuto = new Vehicle("sedan");

Quizplus · Accepted Answer

Option D is not valid because it is creating an object of the parent class, Vehicle, which is an abstract class and cannot be instantiated. Only its concrete subclasses, such as Auto, can be instantiated. Options A, B, and C are all valid because they create objects of the child class, Auto, and assign them to variables of either the same class or a superclass or interface that the class implements.

Consider the Following Class Hierarchy: Which of the Following