Unit 1 APCSA

Which of the following is not a primitive type?

• int

• double

• String

• boolean

• char

Which of the following statements is true about variables?

• The memory associated with a variable of a primitive type holds an actual primitive value.

• When a variable is declared final, its value can only be changed through a direct reassignment

• A variable originally created as an int can be changed to store a double through casting

• All of these choices are true

What is the value of x after this code runs

int x = 5;

x = 10;

x*=2;

x+=3;

• 23

• 3

• 33

• 13

What is the value of x after this code runs

int x = 5;

x = 10;

x = 4;

• 5

• 10

• 4

• true

What is the proper syntax to declare and initialize a variable called temperature to have the value 70.4?

• int temperature = 70.4

• double temperature = 70.4;

• temperature = 70.4;

• dbl temperature = 70.4;

• temperature = (double)70.4

What is the result of this expression?

(int) (5 + 2 / 3 + 1)

• 5

• 6

• 6.67

• 7

• 0

Which expression returns the 1’s place of an integer x?

• x % 10

• x / 10

• x % 100

• x + 1

• x / 100

What is the value of myInteger after this line of code is executed?

int myInteger = (int) 5.6;

• 6

• 5.6

• 5

• 9

What output will be produced by

System.out.println("Hello");

System.out.println("Karel");

• Hello Karel

• HelloKarel

• Hello

  Karel

• Error

Refer to the following code segment:

double myDouble = 1/4;

System.out.println("1 / 4 = " + myDouble);

The output of the code is:

1 / 4 = 0.0

The student wanted the output to be:

1 / 4 = 0.25

Which change to the first line of their code segment would get the student the answer that they wanted?

• int myDouble = 1/4;

• double myDouble = (double) 1/4;

• double myDouble = (int) 1/4;

• double myDouble = (int)(1.0/4.0);