AP CS A CH 1 Review

Consider the following code segment.

int j = 10;

int k = 8;

j += 2;

k += j;

System.out.print(j);

System.out.print(" ");

System.out.println(k);

What is printed when the code segment is executed?

• 2 2

• 2 10

• 10 8

• 12 12

• 12 20

Consider the following code segment.

int x = 0;

x++;

x += 1;

x = x + 1;

x -= -1;

System.out.println(x);

What is printed when the code segment has been executed?

• 0

• 1

• 2

• 3

• 4

Consider the following code segment.

int num = 5;

num *= 2;

num %= 6;

What is the value of num after the code segment is executed?

• 1

• 2

• 4

• 6

• 10

Consider the following code segment.

int x = /* initial value not shown */;

int y = /* initial value not shown */;

int z = x;

z /= y;

z += 2;

Which of the following best describes the behavior of the code segment?

• It sets z to 2.

• It sets z to x.

• It sets z to (1 / y) + 2.

• It sets z to (x / y) + 2.

• It sets z to (x + 2) / y.

Consider the following code segment, which is intended to calculate the average of two quiz scores.

double avg = 15 + 20;

avg /= 2;

Which of the following best describes the behavior of the code segment?

• The code segment stores 17 in avg because 17 is the result of the integer division of 35 by 2.

• The code segment stores 18 in avg because 18 is the result of the integer division of 35 by 2.

• The code segment stores 17.5 in avg because 17.5 is the result of the floating point division of 35.0 by 2.

• The code segment does not compile because int values cannot be added to double values.

• The code segment does not compile because a double value cannot be divided by an int value.

Consider the following code segment.

int x = 4;

int y = 6;

x -= y;

y += x;

Which of the following best describes the behavior of the code segment?

• The value of x and the value of y have not been changed.

• Both the value of x and the value of y have been decreased.

• Both the value of x and the value of y have been increased.

• The value of x has been decreased and the value of y has been increased.

• The value of x has been increased and the value of y has been decreased.

Consider the following code segment.

double d = 0.25;

int i = 3;

double diff = d - i;

System.out.print((int)diff - 0.5);

What is printed as a result of executing the code segment?

• -2

• -2.5

• -3

• -3.25

• Nothing is printed because an int cannot be subtracted from a double.

Consider the following code segment.

double a = 7;

int b = (int) (a / 2);

double c = (double) b / 2;

System.out.print(b);

System.out.print(" ");

System.out.print(c);

What is printed as a result of executing the code segment?

• 3 1

• 3 1.0

• 3 1.5

• 3.5 1.5

• 3.5 1.75

Consider the following code segment.

double p = 10.6;

double n = -0.2;

System.out.println((int) (p + 0.5));

System.out.print((int) (n - 0.5));

What is printed as a result of executing the code segment?

• 10

  -1

• 10

  0

• 11

  -1

• 11

  0

• 11

  1

Consider the following code segment, which is intended to display 0.5.

int num1 = 5;

int num2 = 10;

double ans = num1 / num2;

System.out.print(ans);

Which of the following best describes the error, if any, in the code segment?

• There is no error and the code works as intended.

• The code should have cast the expression num1 / num2 to double.

• The code should have cast either num1 or num2 in the expression num1 / num2 to double.

• The code should have declared ans as an int.

• The code should have initialized num1 to 5.0 and num2 to 10.0.