Java Programming Quiz

What is System.out.println used for in Java?

• To create a new variable

• To display text with a newline at the end

• To stop the program

• To read user input

What’s the difference between print and println in Java?

• print adds a newline; println does not

• println prints text without a newline; print adds a newline

• println adds a newline; print does not

• They both do the same thing

Which of the following declares an integer variable in Java?

• double x = 10;

• int x = 10;

• String x = 10;

• boolean x = true;

What is the purpose of the double data type?

• To store true or false values

• To store whole numbers

• To store large, floating-point numbers

• To store text

How would you declare a string variable named name in Java?

• String name = "John";

• int name = "John";

• double name = "John";

• boolean name = "John";

Which data type would be best for storing a true or false value?

• int

• boolean

• double

• String

What does JOptionPane.showMessageDialog do in Java?

• Displays a dialog box with a message

• Reads user input from the keyboard

• Initializes a new variable

• Opens a new file

Which method would you use to show a pop-up input dialog in Java?

• System.out.print

• JOptionPane.showInputDialog

• JOptionPane.print

• System.in

What does the boolean data type represent?

• Text or strings

• Whole numbers

• True or false values

• Floating-point numbers

Which of the following statements is an example of a syntax error?

• Missing a semicolon at the end of a statement

• Using a variable before declaring it

• A program that performs the wrong calculation

• Declaring a variable with int instead of double