What will be the output of the following Java program?
import java.util.*;
public class genericstack
{
Stack stk = new Stack ();
public void push(E obj)
{
stk.push(obj);
}
public E pop()
{
E obj = stk.pop();
return obj;
}
}
class Output
{
public static void main(String args[])
{
genericstack gs = new genericstack();
gs.push("Hello");
System.out.print(gs.pop() + " ");
genericstack gs = new genericstack();
gs.push(36);
System.out.println(gs.pop());
}
}
import java.util.*;
public class genericstack
{
Stack stk = new Stack ();
public void push(E obj)
{
stk.push(obj);
}
public E pop()
{
E obj = stk.pop();
return obj;
}
}
class Output
{
public static void main(String args[])
{
genericstack gs = new genericstack();
gs.push("Hello");
System.out.print(gs.pop() + " ");
genericstack gs = new genericstack();
gs.push(36);
System.out.println(gs.pop());
}
} A. Error
B. Hello
C. 36
D. Hello 36
Answer: Option D
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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