Primitive Types Quiz Review

Which of the following is not a primitive type?

• int
• boolean
• String
• char
• double

What is the value of x after this code runs?

int x = 5;

x = 10;

x = 4;

• 5

• 10

• 4

• true

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 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

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

• x % 10

• x / 10

• x % 100

• x + 1

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

Given a and b as properly initialized integers, which of the following will result in a correct calculation with a decimal answer?

• double y = (double) (a / b);

• double y = a / b * 1.0;

• double y = a / b;

• double y = 1.0 * a / b;

Assume y is a properly initialized positive integer. Which of the following will always result in a value of 1?

• y++;

• y--;

• y += y;

• y /= y;

• y -= y;

How many lines will be printed with the following statement?

System.out.println("Hello");

System.out.println(" World");

System.out.print("Welcome to");

System.out.print("Java.");

• 1

• 2

• 3

• 4