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Question 98 / 297:  What is the result of compiling and running the following code?
interface Chewable {}

interface Eatable extends Chewable{}

class Food implements Chewable { }

class Meat extends Food {}

class Gum implements Chewable{}

public class Tester {

public static void main(String[] args) {

Food food = new Food();

Meat meat = new Meat();

Gum gum = new Gum();

System.out.print(food instanceof Eatable);

System.out.print(meat instanceof Food);

System.out.print(gum instanceof Food);

System.out.print(gum instanceof Chewable);

}

}

Oracle Certified Professional Java Programmer Yasser Ibrahim using instanceof in java
A  truetruetrutrue
B  truetruefalsetrue
C  falsetruefalsetrue
D  Compilation error
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Explanation:

Compilation error because of "gum instanceof Food"

The operands of instanceof must be in the same inheritance tree.

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