Inheritance
Polymorphism
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Quiz: Java Inheritance and Polymorphism
The quiz contains 11 questions and there is no time limit. You can get between 1 and 3 points for answering the questions correctly. At the end of the quiz, you'll receive a total score. You can compare yourself with other users via the leaderboard. If you achieve more than 70% you will be rewarded with a certificate. Good luck!
Test your understanding of inheritance and polymorphism: - Single inheritance - Multilevel inheritance - Hierarchical inheritance - Static polymorphism - Dynamic polymorphism
Leaderboard: Java Inheritance and Polymorphism
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Question 1 of 11
1. Question
1 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class SingleInheritanceQuiz { public static void main(String[] args) { Dog obj = new Dog(); obj.printDog(); } }CorrectIncorrect -
Question 2 of 11
2. Question
1 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class SingleInheritanceQuiz { public static void main(String[] args) { Dog obj = new Dog(); obj.printAnimal(); } }CorrectIncorrect -
Question 3 of 11
3. Question
2 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class SingleInheritanceQuiz { public static void main(String[] args) { Animal obj = new Animal(); obj.printDog(); } }CorrectIncorrect -
Question 4 of 11
4. Question
1 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class Cat extends Dog { public void printCat() { System.out.println("This is a Cat"); } }; class MultilevelInheritanceQuiz { public static void main(String[] args) { Cat obj = new Cat(); obj.printAnimal(); } }CorrectIncorrect -
Question 5 of 11
5. Question
2 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class Cat extends Dog { public void printCat() { System.out.println("This is a Cat"); } }; class MultilevelInheritanceQuiz { public static void main(String[] args) { Dog obj = new Cat(); obj.printCat(); } }CorrectIncorrect -
Question 6 of 11
6. Question
1 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class Cat extends Animal { public void printCat() { System.out.println("This is a Cat"); } }; class helloworld { public static void main(String[] args) { Dog obj = new Cat(); obj.printCat(); } }CorrectIncorrect -
Question 7 of 11
7. Question
1 point(s)What is the output?
class Animal { public void printAnimal() { System.out.println("This is an Animal"); } }; class Dog extends Animal { public void printDog() { System.out.println("This is a Dog"); } }; class Cat extends Animal { public void printCat() { System.out.println("This is a Cat"); } }; class helloworld { public static void main(String[] args) { Dog obj1 = new Dog(); Cat obj = new Cat(); obj.printAnimal(); obj1.printDog(); } }CorrectIncorrect -
Question 8 of 11
8. Question
1 point(s)What is the output?
class StaticPolymorphism { void sum(int a, int b) { System.out.println(a + b); } void sum(double a, double b, double c) { System.out.println(a + b + c); } public static void main(String[] args) { StaticPolymorphism obj = new StaticPolymorphism(); obj.sum(1, 2, 3); obj.sum(1.5, 2.5); } }CorrectIncorrect -
Question 9 of 11
9. Question
1 point(s)What is the output?
void sum(int a, int b) { System.out.println(a + b); } void sum(double a, double b, double c) { System.out.println(a + b + c); } public static void main(String[] args) { helloworld obj = new helloworld(); obj.sum(1.5, 2.5, 3.5); obj.sum(1, 2); }CorrectIncorrect -
Question 10 of 11
10. Question
1 point(s)Is the output the same for
aandcclass A { void print() { System.out.println("overridden method"); } } class B extends A { void print() { System.out.println("overriding method1"); } } class C extends A { void print() { System.out.println("overriding method2"); } } public class helloworld { public static void main(String[] args) { A a = new C(); C c = new C(); a.print(); c.print(); } }CorrectIncorrect -
Question 11 of 11
11. Question
1 point(s)Wat is the output for
a?class A { void print() { System.out.println("overridden method"); } } class B extends A { void print() { System.out.println("overriding method1"); } } class C extends A { void print() { System.out.println("overriding method2"); } } public class helloworld { public static void main(String[] args) { A a = new B(); a.print(); } }CorrectIncorrect
