Kuis 2

Abtract class can be instantiated

• True

• False

Abtract class cannot be extend

• True

• False

Abstract class only contains abstract methods

• True

• False

Interface can contains abstract methods

• True

• False

Interface implemented using the keyword 'implements'

• True

• False

public interface Vegetarian{}

public class Animal{}

public class Deer extends Animal implements Vegetarian{}

public class Lion extends Animal {}

Deer d = new Deer();

Lion l = new Lion();

Question:

Vegetarian v = d;

• Valid

• Invalid

public interface Vegetarian{}

public class Animal{}

public class Deer extends Animal implements Vegetarian{}

public class Lion extends Animal {}

Deer d = new Deer();

Lion l = new Lion();

Question:

Vegetarian v2 = l;

• Valid

• Invalid

public interface Vegetarian{}

public class Animal{}

public class Deer extends Animal implements Vegetarian{}

public class Lion extends Animal {}

Deer d = new Deer();

Lion l = new Lion();

Question:

Animal a = d;

• Valid

• Invalid

public interface Vegetarian{}

public class Animal{}

public class Deer extends Animal implements Vegetarian{}

public class Lion extends Animal {}

Deer d = new Deer();

Lion l = new Lion();

Question:

Animal a2 = l;

• Valid

• Invalid

Based on the UML which is represented abstract class

• Orang

• Hewan

• Ikan

• Kucing