What will be the output of the following Java program?
interface calculate
{
int VAR = 0;
void cal(int item);
}
class display implements calculate
{
int x;
public void cal(int item)
{
if (item<2)
x = VAR;
else
x = item * item;
}
}
class interfaces
{
public static void main(String args[])
{
display[] arr=new display[3];
for(int i=0;i<3;i++)
arr[i]=new display();
arr[0].cal(0);
arr[1].cal(1);
arr[2].cal(2);
System.out.print(arr[0].x+" " + arr[1].x + " " + arr[2].x);
}
}
interface calculate
{
int VAR = 0;
void cal(int item);
}
class display implements calculate
{
int x;
public void cal(int item)
{
if (item<2)
x = VAR;
else
x = item * item;
}
}
class interfaces
{
public static void main(String args[])
{
display[] arr=new display[3];
for(int i=0;i<3;i++)
arr[i]=new display();
arr[0].cal(0);
arr[1].cal(1);
arr[2].cal(2);
System.out.print(arr[0].x+" " + arr[1].x + " " + arr[2].x);
}
}A. 0 1 2
B. 0 2 4
C. 0 0 4
D. 0 1 4
Answer: Option C
This Question Belongs to Java Program >> Interfaces And Abstract Classes
A. A contract specifying a set of methods that a class must implement
B. A class that cannot be instantiated
C. A class that contains only static methods
D. A subclass of the Object class
In Java, can a class implement multiple interfaces?
A. Interfaces cannot be implemented by classes
B. Only abstract classes can implement interfaces
C. No, a class can only implement one interface
D. Yes, a class can implement multiple interfaces
What is the purpose of an abstract class in Java?
A. To declare abstract methods
B. To provide a base class with common methods and fields
C. To make a class final
D. To declare abstract methods
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