public class Bank Account private double balance public Bank Account balance 0;

ID: 3813730 • Letter: P

Question

public class Bank Account private double balance public Bank Account balance 0; public BankAccount double acctBalance) balance acctBalance; public void deposit (double amount) balance amount; public void withdraw (double amount) balance amount; public double getBalance return balance public clasa SavingsAccount extends BankAccount private double interestRatei Public SevingaAccount implementation not shown Y public savingsAccounts (double acctBalance, double rate) implementation not shown k/ public void addInterest //Add interest to balance t impleaentation not shown public class checkingAccount extends BankAccount private static final double FEE 2.0 private static final double MIN BALANCE 50.0; public CheckingAccount double acctBalance) implexentation not shown 1 FEE of $2 deducted if withdrawal leaves balance less than MIN BALANCE. Allows for negative balance. public void withdraw (double arnount) implementation not shown

Explanation / Answer

hi please find the below answer and expalnation

for question 3rd correct option is C & D

for question 4th correct option is E

Explanation as per below

In SavingsAccount class have constructor with parameter is

public SavingsAccount(double accBalance, double rate){

}
for this ques correct option will be C & D
explanation for C -> super() will call parent class constructor with no parameter i.e, public BankAccout(){}
           and second line interestRate = rate , it will initialize instace variable "interestRate" in class SavingsAccount

explanation for D -> super(acctBalance) will call parent class constructor with parameter i.e, public BankAccout(double accBalance){}
                   and second line interestRate = rate , it will initialize instace variable "interestRate" in class SavingsAccount.

Option E is not correct because super(accBalance, rate) and in parent class no any constructor taking two parameters
Option A is incorrect because it is accessing priavte member "balance" from parent class which will be not accessible.
Option B is Wrong because getBalance() returning a int value and here trying to assigns a new value which is wring assignment type;

In CheckingAccount class correct implementation of constructor is

E I,II and III all are correct

Explanation -> I uper(acctBalance) will call parent class constructor with parameter i.e, public BankAccout(double accBalance){}
           II super() will call parent class constructor with no parameter i.e, public BankAccout(){}
           deposit(accBalance) will invoke Parent class method deposit(double accBalance)

           III deposit(accBalance) will invoke Parent class method deposit(double accBalance)

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public class Bal1 private double rx, ry: public Ball) { rx = 0.5; ry= 0.5; } 6 p

public class Bank Account private double balance public Bank Account balance 0;

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public class Bank Account private double balance public Bank Account balance 0;

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