Java Level 1 Complete Review

Which of the following can be used for decimal values?

• int
• double
• long
• String

In Java a string is a

• Group of visible symbols contained in "quotes"
• Long strand of thread
• A series of objects arranged in a line
• A series of objects arranged in a line

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?

• myInt
• myint!
• 4isMyFavoriteInt
• my int

What will the following statement display when run? System.out.println(5+2*4-1);

• 12

• 27

• 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);

• "str3+str1"
• "HelloGoodbyeHello"
• "HelloHelloGoodbye"
• "Hello GoodBye Hello"

Variable names can start with an underscore.

• True
• False

Variables are case sensitive.

• True
• False

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

• True
• False

In Java, variables have to be given a specific type.

• True
• False