1. Which of these expressions evaluates to 5.5?(1 point)

I. (double)(11 / 2) II. 11 / (double)2 III. 11 / 2.0

Question 1 options:

1)

I only

2)

II only

3)

III only

4)	II and III only

5)	I, II, and III

2. How many columns are in the array? (1 point)

char[][] array1 = new char[15][10];

Question 2 options:

1)

0

2)

2

3)

10

4)

15

3. If String str = "The There Here", then what is the value of str.indexOf("he");?(1 point)

Question 3 options:

1)

0

2)

1

3)

2

4)

5

5)

e. -1

4. What is the value of vals[4][1]?(1 point)

double[][] vals = {1.1, 1.3, 1.5}, {3.1, 3.3, 3.5}, {5.1, 5.3, 5.5}, {7.1, 7.3, 7.5}

Question 4 options:

1)

1.1

2)

7.1

3)

7.3

4)	There is no such value.

5. Consider the method total below.(1 point)

public static int total (int result, int a, int b) { if (a == 0) { if (b == 0) { return result * 2; } return result / 2; } else { return result * 3; } }The assignment statementx = total (5, 0, 1);must result in

Question 5 options:

1)	x being assigned the value 15

2)	x being assigned the value 10

3)	x being assigned the value 5

4)	x being assigned the value 2

5)	e. x being assigned the value 0

6. Which of the following statements creates alpha, a two-dimensional array of 10 rows and 5 columns, wherein each component is of the type int?(1 point)

int[][] alpha = new int[10][5];

int[][] alpha; alpha = new int[10][]; for (int i = 0; i < 10; i++) alpha[i] = new int[5];

Question 6 options:

1)

Only (i)

2)

Only (ii)

3)	Both (i) and (ii)

4)	None of these

7. Consider the method total below.(1 point)

public static int total (int result, int a, int b) { if (a == 0) { if (b == 0) { return result * 2; } return result / 2; } else { return result * 3; } } The assignment statement x = total (5, 0, 0); must result in

Question 7 options:

1)	x being assigned the value 4

2)	x being assigned the value 8

3)	x being assigned the value 5

4)	x being assigned the value 2

5)	x being assigned the value 10

8. Consider the following definitions.

public boolean state (int[] list, int value) { int counter; boolean flag = false; for (counter = 0; counter < list.length; counter++) { flag = (list[counter] != value); } return flag; }

Under which of the following conditions must the method above return true ? (1 point)

Question 8 options:

1)	Under all conditions.

2)	Under the condition that value == list[list.length - 1].

3)	Under the condition that value != list[list.length - 1].

4)	Under the condition that value != list[i] for all i such that 0 <= i < list.length.

5)	Under no conditions.

9. What is the output of the program shown below? (1 point)

public class SomeClass { private int x, y; public SomeClass (int xValue, int yValue) { x = xValue; y = yValue; } public void m1() { x = 30; System.out.print((y + 1) + " "); } public void m2() { m1(); System.out.print(x + " "); } } public class Tester { public static void main (String[] args) { int x = 10; int y = 20; SomeClass z = new SomeClass(y, x); z.m2(); z.m1(); } }

Question 9 options:

1)

21 10 21

2)

21 30 21

3)

11 30 11

4)

1 10 11

5)

11 30 21

10. What is output by the following code? (1 point)

public class Swapper { private int a, b; public Swapper(int aValue, int bValue) { a = aValue; b = bValue; } public void swap () { a = b; b = a; } public void print () { System.out.println("a = " + a + ", and b = " + b); } } public class Tester { public static void main(String[] args) { Swapper swapObj = new Swapper(10, 20); swapObj.swap(); swapObj.print(); } }

Question 10 options:

1)	a = 10, and b = 20

2)	a = 20, and b = 10

3)	a = 10, and b = 10

4)	a = 20, and b = 20

5)	None of the above

11. If the value of f(x, y, z) is always an integer, which of the following conditions ensures that the loop below terminates? (1 point)

while (f(x, y, z) < 100) { }

Question 11 options:

1)	x, y, and z are each increased during each iteration.

2)	The value of f(x, y, z) is increased during each iteration.

3)	x, y, and z are each decreased during each iteration

4)	The sum of x, y, and z is decreased during each iteration.

5)	The value of Math.pow (f(x, y, z), 2) is decreased during each iteration.

12. The following program segment is intended to sum a[0] through a[n-1], where n = a.length:

sum = 0; i = 0; n = a.length; while (i != n) { i++; sum += a[i]; }

In order for this segment to perform as intended, which of the following modifications, if any, should be made?(1 point)

Question 12 options:

1)	no modification is necessary

2)	sum = 0; i = 0; should be changed to sum = a[1]; i = 1;

3)	while (i != n) should be changed to while (i <= n)

4)	sum += a[i]; should be changed to sum += a[i+1];

5)	i++; should be interchanged with sum += a[i];

13.

What is the output of the following program?(1 point)

int sum = 0, k, val = 1; for (k = 0; k <=4; k++) { sum += val; val++; } System.out.println(sum);

Question 13 options:

1)

15

2)

28

3)

16

4)

10

5)

21

14. The purpose of a class constructor is to (1 point)

Question 14 options:

1)	initialize the class instance variables.

2)	describe the conditions under which the compiler is to abort compilation.

3)	describe the conditions under which the method may be called so that it satisfies its postcondition.

4)	describe the algorithm used by the constructor.

5)	describe the conditions that are true when the method completes.

15. When is it not necessary to invoke method myMethod using dot notation? (1 point)

Question 15 options:

1)	When myMethod is private.

2)	When myMethod is invoked by a method in the same class as myMethod.

3)	When myMethod is public.

4)	When myMethod is both private and static.

5)	When myMethod is invoked by a method in a different class than myMethod.

16.

What is a mutator method? (1 point)

Question 16 options:

1)	A method that returns an instance variable or a calculation.

2)	A method that modifies an instance variable.

3)	A constructor that initializes instance variables.

4)	Any method that has a return value other than void.

5)	Any method that has a return value of void.

17.

What is the output of the following code?(1 point)

ArrayList grades = new ArrayList(); grades.add(88); grades.add(92); grades.add(95); grades.add(1, 80); grades.add(83); System.out.println(grades.get(2 + 3 / 2));

Question 17 options:

1)	An IndexOutOfBoundsException occurs.

2)

88

3)

92

4)

80

5)

95

18.

Consider the following class designed to store weather statistics at a particular date and time.

public class WeatherSnapshot { private int tempInFahrenheit; private int humidity; // value of 56 means 56% humidity private int dewpoint; // in degrees Fahrenheit private Date date; // uses a Date object to store the date private int time; // in military time, such as 1430 = 2:30 pm private boolean cloudy; // true if 25% or more of the sky is covered // constructor not shown, but it initializes all instance variables // postcondition: returns temperature public int getTemp() { return tempInFahrenheit; } // postcondition: returns date public Date getDate() { return date; } // postcondition: returns true if precipitation is likely; false otherwise public boolean precipitationLikely() { // implementation not shown } // other methods not shown }

Which of the following is a class constructor? (1 point) I. getTemp II. precipitationLikely III. WeatherSnapshot

Question 18 options:

1)

I only

2)	I and II only

3)

II only

4)	I and III only

5)

III only

19.

Consider the following class designed to store weather statistics at a particular date and time.

public class WeatherSnapshot { private int tempInFahrenheit; private int humidity; // value of 56 means 56% humidity private int dewpoint; // in degrees Fahrenheit private Date date; // uses a Date object to store the date private int time; // in military time, such as 1430 = 2:30 pm private boolean cloudy; // true if 25% or more of the sky is covered // constructor not shown, but it initializes all instance variables // postcondition: returns temperature public int getTemp() { return tempInFahrenheit; } // postcondition: returns date public Date getDate() { return date; } // postcondition: returns true if precipitation is likely; false otherwise public boolean precipitationLikely() { // implementation not shown } // other methods not shown }

Suppose a WeatherSnapshot object named currentWeather has been correctly instantiated in a client class. Which of the following will correctly call the precipitationLikely method? (1 point)

Question 19 options:

1)	boolean couldRain = precipitationLikely();

2)	boolean couldRain = currentWeather.precipitationLikely();

3)	boolean couldRain = currentWeather.precipitationLikely()

4)	double percentChanceOfRain = precipitationLikely();

5)	double percentChanceOfRain = currentWeather.precipitationLikely();

20.

What is meant by the term "encapsulation"? (1 point)

Question 20 options:

1)	Encapsulation occurs when client code is allowed to have direct access to instance variables.

2)	Encapsulation is the operator that gives the remainder after division.

3)	Encapsulation is the term used when a class constant is created.

4)	Encapsulation occurs when instance variables are declared as private.

5)	Encapsulation occurs when a class has mutator methods.

21.

What is output by the following code fragment?(1 point)

String[] fruits = { "apple", "banana", "peach", "strawberry" }; String str = "a"; for (String item : fruits) { str += item.substring(1, 2); } System.out.println(str);

Question 21 options:

1)

aabps

2)

aapbapest

3)

apaet

4)

appaneatr

5)

appbaeast

22.

Consider the following code segment. What would be the expected output?(1 point)

int i = 10; while (i >= 0) { if ((i % 2) > 0) { System.out.print(i + " "); } i -= 2; }

Question 22 options:

1)

10 9 8 7

2)

8 2

3)

10 8 4 2

4)	10 8 5 4 2

5)	nothing is printed

23.

Assume that the following code exists inside a method of MyClass, and that this code compiles without errors: int result = book.getYearPublished(); where book is an object of the Book class.

Which of the following is not true about the getYearPublished method?(1 point)

I. It is a mutator method. II. It is a public method in the Book class. III. It returns a String.

Question 23 options:

1)

I only

2)

II only

3)

III only

4)	I and II only

5)	I and III only

24.

Complete the Car class shown below. A Car has a fuel tank level, and a miles per gallon value. Assume that all cars have 12 gallon gas tanks. (20 points)

public class Car { // declare your constants and instance variables here // postcondition: all instance variables are initialized public Car(double mpgValue, double gallons) { } // postcondition: the fuel level is increased by the amount given by the parameter public void addFuel(double gallons) { } // postcondition: the fuel tank level is decreased by the amount of gas // that it would take this Car to drive the number of miles given by the parameter // The fuel level cannot be negative. public void drive(double miles) { } // other methods not shown }