Java Final review

Which of the following can be used for decimal values?

• integer
• string
• boolean
• float

In Java a string is a:

• sequence of characters surrounded by quotes

• data structure
• boolean value
• collection of integers

Which of the following is the correct way to create a String in Java?

• "Hello, World" = String message;

• String message = "Hello, World!";

• message = Hello, World!;

• String = "Hello, World!"

Which of the following is acceptable as a variable name in Java for int type?

• my Var

• variable!

• 123variable
• myVariable

What will the following statement display when run?

System.out.println(5+2*4-1);

• 12
• 21

• 5+2*4-1

• 11

What will the following statements display when run?

String str1="Hello";

String str2="Goodbye";

String str3=str1+str2;

System.out.println(str3+str1);

• Hello Goodbye Hello

• str3+str1

• HelloHelloGoodbye
• HelloGoodbyeHello

Variable names can start with an underscore.

• True
• False

Variables are case sensitive.

• No
• Yes

Concatenation is the joining of two or more strings in Java.

• True

• False

In Java variables have to be given a specific type.

• Yes
• Only for integers
• Sometimes
• No