Cuestionario 11. 1Z0-808

Given the following two classes:

Customer.java
public class Customer {
 
    ElectricAccount acct = new ElectricAccount();
 
    public void useElectricity(double kWh) {
        acct.addKWh(kWh);
    }
}

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ElectricAccount.java
public class ElectricAccount {
 
    private double kWh;
    private double rate = 0.07;
    private double bill;
 
    // line n1
}

How should you write methods in the ElectricAccount class at line n1 so that the member variable bill is always equal to the value of the member variable kwh multiplied by the member variable rate?

Any amount of electricity used by a customer (represented by an instance of the customer class) must contribute to the customer’s bill (represented by the member variable bill) through the method useElectricity method. An instance of the customer class should never be able to tamper with or decrease the value of the member variable bill.

Given the code fragments:

Person.java
public class Person {
 
    String name;
    int age;
 
    public Person(String n, int a) {
        name = n;
        age = a;
    }
 
    public String getName() {
        return name;
    }
 
    public int getAge() {
        return age;
    }
}

======================================

Test.java
public class Test {
 
    public static void checkAge(List list, Predicate predicate) {
        for (Person p : list) {
            if (predicate.test(p)) {
                System.out.println(p.name + " ");
            }
        }
    }
 
    public static void main(String[] args) {
        List iList = Arrays.asList(new Person("Hank", 45), new Person("Charlie", 40), new Person("Smith", 38));
        // line n1
    }
}

Which code fragment, when inserted at line n1, enables the code to print Hank?

Given the code fragment:

public static void main(final String[] args) throws Exception {
    String[][] arr = {{"A", "B", "C"}, {"D", "E"}};
    for (int i = 0; i < arr.length; i++) {
        for (int j = 0; j < arr[i].length; j++) {
            System.out.print(arr[i][j] + " ");
            if (arr[i][j].equals("B")) {
                break;
            }
        }
        continue;
    }
}

What is the result?