Java Generics Online Test – 2

1. What will be the output of the following Java program?

    import java.util.*;
    public class genericstack <E>
    {
        Stack <E> stk = new Stack <E>();
	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 <String> gs = new genericstack<String>();
            gs.push("Hello");
            System.out.println(gs.pop());
        }
    }

2. What will be the output of the following Java program?

    import java.util.*;
    public class genericstack <E>
    {
        Stack <E> stk = new Stack <E>();
	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 <Integer> gs = new genericstack<Integer>();
            gs.push(36);
            System.out.println(gs.pop());
        }
    }

3. Which of these type parameters is used for a generic methods to return and accept any type of object?

4. What are generic methods?

5. What will be the output of the following Java program?

    import java.util.*;
    public class genericstack <E>
    {
        Stack <E> stk = new Stack <E>();
        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 <String> gs = new genericstack<String>();
            gs.push("Hello");
            System.out.print(gs.pop() + " ");
            genericstack <Integer> gs = new genericstack<Integer>();
            gs.push(36);
            System.out.println(gs.pop());
        }
    }

6. Which of the following allows us to call generic methods as a normal method?

7. Which of these is an correct way of defining generic method?

8. Which of these type parameters is used for a generic methods to return and accept a number?