A1: zero_divide, dup_vall_on_index, invalid_number,
A3: the caller (ie caller of the pl/sql code) receives it
A2: system raise exceptions. The programmer can also raise a user-defined exception.
q1: name a few common pl/sql exceptions and how did you handle them
q3: what if you don't handle an particular type of exception? Tell me what happens?
q2: how and when can you RAISE an exception@@
q: EXCEPTION comes before or after RETURN in a function? This could appear in a paper quiz.
