Which is a correct implementation of the constructor with...

Which is a correct implementation of the constructor with parameters in the SavingsAccount class? (A) balance = acctBalance; interestRate = rate; (B) getBalance() $=$ acctBalance; interestRate = rate; (C) super(); interestRate $=$ rate (D) super(acctBalance); interestRate = rate; (E) super(acctBalance, rate);

Which is a correct implementation of the constructor with parameters in the SavingsAccount class?
(A) balance = acctBalance;
interestRate = rate;
(B) getBalance() $=$ acctBalance;
interestRate = rate;
(C) super();
interestRate $=$ rate
(D) super(acctBalance);
interestRate = rate;
(E) super(acctBalance, rate);

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Key Concepts

Parameter Passing in Constructors

Parameter passing in constructors allows values to be provided at the time of object creation to initialize the object’s state. When combined with constructor chaining, parameters can be forwarded to a superclass constructor, ensuring that both the inherited and subclass-specific fields are initialized correctly.

Constructor Chaining

Constructor chaining refers to the process where one constructor calls another constructor, either within the same class using the 'this' keyword or from the superclass using 'super'. This technique ensures a consistent and complete initialization of an object’s state across the class hierarchy.

Super Keyword

The super keyword is used in a subclass to refer to its immediate parent class. It is commonly used to call a parent class’s constructor, allowing the subclass to initialize the inherited fields properly and maintain the parent's construction logic.

Inheritance

Inheritance is a core concept in object-oriented programming where a class (subclass) can inherit attributes and behaviors (methods) from another class (superclass). This allows for the reusability of code and the creation of hierarchical relationships among classes.

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