You have files Dessert.java, BlueberryMuffin.java, and a driver class named Driver.java. Fill in the correct visibility modifiers so that the comments in the class BlueberryMuffin and Driver’s main method are upheld. public class Dessert {   1 void eat() { /*compiles*/ }   2 void split() { /*compiles*/ }   3 void purchase() { /*compiles*/ } } —– in a separate file in a different package/directory —– public class BlueberryMuffin extends Dessert {   public void nom() { split(); // doesn’t compile purchase(); // compiles }} —– in a separate file in a different package/directory —– public class Driver { public static void main(String[] args) {        BlueberryMuffin b = new BlueberryMuffin();        b.eat(); // compiles        b.split(); // doesn’t compile        b.purchase(); // doesn’t compile }}   1   : [1]  2   : [2]  3   : [3]

public abstract class Landmark { public abstract int countVisitors();} Consider the class shown above. Which of the following class definitions will NOT compile?

Given 3 classes (Tulip, Flower, and Plant), Tulip can inherit from both Flower and Plant with the following syntax: public class Tulip extends Flower, Plant { /* valid class definition */}

   Noodle n1 = new Pasta(); Noodle n2 = new Ramen(); Pasta p = new Pasta(); Ramen r = new Ramen();  For the class hierarchy and declarations above, correctly indicate whether each of the following statements will compile and what will happen at runtime (runs correctly or runtime exception). It may be helpful to use scratch paper to keep track of each variable’s static and dynamic type. 1  Noodle noodle = (Noodle) r; 2   Ramen r1 = (Ramen) n1;  3  Ramen r2 = (Ramen) p; 4  Ramen r3 = (Ramen) n2;   1   : [1]  2   : [2]  3   : [3]  4   : [4]

public abstract class Landmark { public abstract int countVisitors();} Consider the class shown above. Which of the following class definitions will NOT compile?

Fill in the blanks to implement the toString method. public class Dog {    private String name;    private String owner;    private int age;    public 1 toString( 2 ) {       3    }}   1  :[1]   2  :[2]   3  :[3]

Analyze the following code and indicate, for each line, whether autoboxing, unboxing, or neither occurs when the assignment operator is evaluated: boolean a = new Boolean(true); // 1 occurs Boolean b = a; // 2 occurs   1   : [1]   2   : [2]

Fill in the blanks to implement the toString method. public class Coffee {   private String brand;    private String[] addOns;     private double price;     public 1 toString( 2 ) {       3    }}   1  :[1]   2  :[2]   3  :[3]

Analyze the following code and indicate, for each line, whether autoboxing, unboxing, or neither occurs when the assignment operator is evaluated: boolean a = new Boolean(true); // 1 occurs Boolean b = a; // 2 occurs   1   : [1]   2   : [2]

Given the following class hierarchy, identify whether the method drive is overloaded, overridden, or neither by the subclass:  public class Car {   public void drive(int miles) { /* implemented */ } } public class Ford extends Car {   public void drive(int miles, String name) { /* implemented */ } }