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 }

7.

Given the following code:

if (n == 2) { k -= 2; } else if (n == 3) { k -= 3; } can be rewritten as if (< condition >) { < assignment statement >; }

where < condition > and < assignment statement > are chosen so that the rewritten code performs the same task as the original code. Assume that both n and k are integer variables.

Which of the following could be used as < condition >? (2 points) I. (n == 2) || (n == 3) II. (n == 2) && (n == 3) III. (n >= 2) && (n <= 3)

Question 7 options:

1)

I only

2)

II only

3)

III only

4)	I and III only

5)	II and III only

8.

What is stored in str after the following code executes? (2 points)

String str = "Computer Science"; int i = 0; while (i < 8) { if (str.indexOf("m") < i) { str = str.substring(0, 2) + str; } i += 2; }

Question 8 options:

1)	Computer Science

2)	CoComputer Science

3)	CoCoComputer Science

4)	CoCoCoComputer Science

5)	Computer ScienceCo

9.

int i = 100; int j = 10; while (i > 0) { i = i / j; j = 1 + j % 5; } What is the value of i after this code executes? (2 points)

Question 9 options:

1)

0

2)

1

3)

2

4)

5

5)

10

10.

Consider the following code:

String[ ] words = {"cat", "dog", "lamb", "giraffe", "elephant"}; int i = 0, index = -1, temp; while (i < words.length) { temp = words[i].indexOf("a"); if (temp > index) { index = temp; } i++; } What is the value of index after this code executes? (2 points)

Question 10 options:

1)

-1

2)

0

3)

1

4)

5

11.

Consider the following code examples, where all variables are of type int.

Example 1 x = n; y = x; while (x > 0) { y += 1; x /= 2; } Example 2 x = n; y = x; if (x > 0) { while (x > 1) { y += 1; x /= 2; } } Assume that the two examples start with the same value for variable n. For which value(s) of n do the two code examples compute the same value for variable y ? (2 points) I.Any value less than zero II.The value zero III.Any value greater than zero

Question 11 options:

1)

I only

2)

II only

3)

III only

4)	I and II only

5)	I, II, and III

12.

Suppose the following array is declared:

int[ ] grades = {88, 92, 95, 83}; What is the value ofgrades[3]? (2 points)

Question 12 options:

1)	An ArrayIndexOutOfBoundsException occurs

2)

88

3)

92

4)

95

5)

83

13.

Suppose the following array is declared:

int[ ] grades = {88, 92, 95, 83};

and the following integer is declared:

int index = 10 - 2 * 4;

What is the value of grades[index]? (2 points)

Question 13 options:

1)	An ArrayIndexOutOfBoundsException occurs

2)

88

3)

92

4)

95

5)

83

14.

Suppose the following array is declared:

int[ ] grades = {88, 92, 95, 83};

What are the values in grades after the following code executes? (2 points)

grades[0] = grades[1];

grades[1] = grades[0];

Question 14 options:

1)	An ArrayIndexOutOfBoundsException occurs

2)	{92, 88, 95, 83}

3)	{88, 88, 95, 83}

4)	{92, 92, 95, 83}

5)	{88, 92, 95, 83}

15.

Suppose the following array is declared:

int[ ] grades = {88, 92, 95, 83};

What is the value of grades[grades[0] / 22]? (2 points)

Question 15 options:

1)	An ArrayIndexOutOfBoundsException occurs

2)

4

3)

88

4)

92

5)

95

5)	An ArrayIndexOutOfBoundsException occurs.