Question
public class Stack
{
protected static final int CAPACITY = 100;
protected int size,top = -1;
protected Object stk[];
public Stack()
{
stk = new Object[CAPACITY];
}
public void push(Object item)
{
if(size_of_stack==size)
{
System.out.println("Stack overflow");
return;
}
else
{
top++;
stk[top]=item;
}
}
public Object pop()
{
if(top<0)
{
return -999;
}
else
{
Object ele=stk[top];
top--;
size_of_stack--;
return ele;
}
}
}
public class StackDemo
{
public static void main(String args[])
{
Stack myStack = new Stack();
myStack.push(10);
Object element1 = myStack.pop();
Object element2 = myStack.pop();
System.out.println(element2);
}
}
a.
stack is full
b.
20
c.
0
d.
none of the mentioned
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Q. What is the output of the following program?
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