What will happen if the body of a for/in loop deletes a property that has not ye

What will happen if the body of a for/in loop deletes a property that has not yet been enumerated?

2) Consider the following code snippet

function printArray(a)
  {
      var len = a.length, i = 0;
      if (len == 0)
         console.log("Empty Array");
      else
       {
          do
           {
              console.log(a[i]);
          }
 while (++i < len);
      }
 }

3) Consider the following code snippet

function tail(o)
{
      for (; o.next; o = o.next) ;
     return o;
 }

4) What will be the step of the interpreter in a jump statement when an exception is thrown?

5) One of the special feature of an interpreter in reference with the for loop is that