Consider the following class hierarchy: Complete the code in the Auto class constructor to store the type data.
A)super(type);
B)super(super(type));
C)super.super(type);
D)This cannot be done unless Auto declares an instance variable named type.

Question

Consider the following class hierarchy:  Complete the code in the Auto class constructor to store the type data. 
A)super(type); 
B)super(super(type)); 
C)super.super(type); 
D)This cannot be done unless Auto declares an instance variable named type.

Quizplus · Accepted Answer

The super() keyword is used to call the constructor of the superclass. In this case, the Auto class extends Vehicle, and therefore the first line of the Auto constructor should call the Vehicle constructor and pass it the type parameter, which is already declared in the Auto constructor arguments. Therefore, the correct way to call the Vehicle constructor is super(type);. Choice B is incorrect because calling super.super() is not allowed in Java. Choice C is also incorrect because the super keyword can only be used to call the constructor of the super class, not the super class of the super class. Choice D is incorrect because there is no need to declare an instance variable named type in Auto since it is already provided as a parameter of the constructor.

Consider the Following Class Hierarchy: Complete the Code in the Auto