10AP Computer Science Review

What data type is this new variable?

___ num = 3.14524;

• double

• int

• String

• boolean

• char

Which data type is used to store whole numbers in Java?

• double

• int

• Integer

• boolean

• dub

Which of the following is a valid way to declare and initialize a String variable in Java?

• String strVar = "Hello";

• strVar = "World";

• strVar = Hello;

• String strVar;

Which data type is used to store true or false values in Java?

• integer

• double

• String

• boolean

• character

Which data type is used to store a single letter or symbol in Java?

• integer

• char

• double

• String

• boolean

Which data type is used to store a sequence of characters/letters/symbols in Java?

• integer

• char

• double

• String

• boolean

What is the proper way to make an if statement?

if ​ ​ (a)   ​ (b)  

System.out.println("x is greater than 5")​ (c)  

​ (d)  

• (x > 5)
• {
• ;
• }
• x > 5
• x > 5;
• [x > 5]
• (
• )

Finish this code to make a while loop:

​ (a)   count = 1;

while ​ (b)   ​ (c)  

System.out.println(count);

count++;

​ (d)  

• int
• (count < 10)
• {
• }
• integer
• (
• )
• count < 10
• [count < 10];

What is the answer to 15 % 4 in Java?

• 1

• 3

• 4

• 15

What is the result of the expression 10 / 3 in Java?

• 3

• 3.33

• 3.0

• 4