Java Quiz 1: Introduction

Which of the following can be used for decimal values?

• int

• String

• long

• double

In Java a string is a:

• Long strand of thread

• A series of objects arranged in a line.

• Group of visible symbols contained in "quotes".

• 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