instanceof

[Mrnewbie]

Does anyone know the answer to this?
Suppose r contains a reference to a new Rectangle(5, 10, 20, 30). Which of these conditions return true?
a) r instanceof Rectangle
b) r instanceof Shape
c) r instanceof Point
d) r instanceof Object
e) r instanceof ActionListener
f) r instanceof Serializable

[chimps]

you need to specify how your class hierarchy is

[sjalle]

a) r instanceof Rectangle - true
b) r instanceof Shape - true
c) r instanceof Point - false
d) r instanceof Object - true
e) r instanceof ActionListener - false
f) r instanceof Serializable - true