Which of the following correctly implements the default...

Which of the following correctly implements the default constructor of the SavingsAccount class?
I interestRate $=0$ super() ;
II super() interestRate $=0$
III super();
(A) II only
(B) I and II only
(C) II and III only
(D) III only
(E) I, II, and III

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Key Concepts

Default Constructor

A default constructor is a no-argument constructor that is provided automatically by the compiler if no other constructors are declared in the class. When a default constructor is explicitly defined, especially in subclasses, it must properly initialize both its own fields and those inherited from its superclass.

Initialization Order

Initialization order in object-oriented programming dictates that the superclass components of an object are fully initialized first via their constructors, followed by the initialization of subclass-specific members. This proper order is essential for maintaining the integrity of the object’s state.

Constructor Chaining

Constructor chaining refers to the process by which a subclass's constructor calls its superclass's constructor to ensure that the inherited fields are properly initialized before executing the subclass-specific code. This concept ensures that the base part of the object is constructed correctly before the derived part.

Super Constructor Invocation

The 'super()' call is used to invoke a superclass's constructor from a subclass. It must be the very first statement in the constructor body, as this requirement ensures that the superclass portion of the object is constructed before any subclass-specific initialization takes place.

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