Select the correct answerWhat will be the output of the following Java program?class A { int i; void display() { System.out.println(i); }}class B extends A { int j; void display() { System.out.println(j); }}class inheritance_demo { public static void main(String args[]) { B obj = new B(); obj.i = 1; obj.j = 2; obj.display(); }}Options102Compilation Error
Question
Select the correct answerWhat will be the output of the following Java program?class A { int i; void display() { System.out.println(i); }}class B extends A { int j; void display() { System.out.println(j); }}class inheritance_demo { public static void main(String args[]) { B obj = new B(); obj.i = 1; obj.j = 2; obj.display(); }}Options102Compilation Error
Solution
The correct answer is 2.
Here's the step by step explanation:
-
Class B extends Class A, which means Class B inherits all the properties and methods of Class A. So, Class B has access to variable 'i' of Class A and its own variable 'j'.
-
In the main method, an object 'obj' of Class B is created.
-
The variables 'i' and 'j' of object 'obj' are set to 1 and 2 respectively.
-
When the display method is called using the object 'obj', the display method of Class B is executed because 'obj' is an object of Class B.
-
The display method of Class B prints the value of 'j', which is 2.
So, the output of the program will be 2.
Similar Questions
Select the correct answerWhat will be the output of the following Java program? final class base { int a; } class derived extends base { int b; System.out.println(b + " " + a); } class inheritance { public static void main(String args[]) { derived obj = new derived(); obj.display(); } }OptionsRuntime Error3 32 2Compilation Error
Assuming that all the necessary imports are done, what will be the output of the following Java program? class parent { int a; } class child extends parent { int b; void display() { super.a = b + 1; System.out.println(b + " " + i); } } class inheritance { public static void main(String args[]) { child obj = new child(); obj.a=1; obj.b=2; obj.display(); }}Options3 32 22 3Compilation Error
Select the correct answerWhat will be the output of the given Java program? abstract class java { int x; abstract void display(); } class method extends java { int y; void display() { System.out.println(y); } } class Abstract_demo { public static void main(String args[]) { method obj = new method(); obj.y = 1; obj.display(); } }OptionsRuntime Error10Compilation Error
What is the output of this program? class A { public int i; private int j; } class B extends A { void display() { super.j = super.i + 1; System.out.println(super.i + " " + super.j); } } class inheritance { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } }2 23 3Runtime ErrorCompilation Erro
elect the correct answerPredict the output of the given Java Programs. class A { public void Print() { System.out.println("B's Print()"); } } class A extends B { public void Print() { System.out.println("A's Print()"); } } class C extends A { public void Print() { super.super.Print(); System.out.println("C's Print()"); } } public class Main { public static void main(String[] args) { C c = new C(); c.Print(); } }OptionsB's Print()C's Print()A's Print()Compiler Error
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.