AP Computer Science A Post Unit 2 Check

If x = 3 and y = 5, choose all the statements that evaluate to True.

• x < y

• y > -x**2

• 2 * x == y

• y % x == 3

A Boolean expression...

• Fixes any errors in the line of code

• Sets everything in it equal to each other

• Checks if something is true or false

• Loops the program to continue infinitely

How many values does a Boolean variable have?

• 4

• 3

• 2

• 1

• Infinite

a = 5

b = 6

Determine the truth value of the following statement:

((a <= b) or (a == b)) and (b > a)

• True

• False

Which Java type can be used to store a true or false value?

• boolean

• bool

• Boolean

• Bool

 Evaluate (to true or false) each of the following expressions:
14 >= 14
15 > 15
16 != 16
18 >= 19

• T, F, F, F
• T, T, T, T
• F, T, F, F
• F, T, T, F

True/False: The body of an "if" statement will only be executed if the condition is true.

• True

• False

What is the value of num after this statement is executed?

int num = 23;

if(num>20) { num = 20; }

else { num = 30; }

• 20

• 30

• 23

• true

What is missing from the command: System.___.println("Hello World");

• prt()

• Sys

• java

• out

How many classes are required in a Java Program?

• At least one.

• None, you can run a basic program without a class.

• Two, one for the main function and one for the function code.

• None of the above.