Regarding Ref Cursor

HI,I am having a doubt in this point of view

A Ref Cursor is not Updatable. The Result set represented by ref cursor is read-only. you cannot update the data base using ref cursor

But i had observed that in both cases i am able to update the data base using these examples

using static cursor

    declare

cursor c is select * from emp;

v_all c%rowtype;

begin

open c;

loop

exit when c%notfound;

fetch c into v_all;

update drk_emp set ename=v_all.ename||'Test' where empno=v_all.empno;

end loop;

close c;

end;