Answer / hema

Exception is an error caused which leads to abnormal
termination of the program...
To handle these exceptions oracle provides 2 types of
exceptions.
1. oracle server exceptions
2. user-defined exceptions.

oracle server exceptions are the exceptions pre-defined by
the oracle server.
for example,
zero_divide with some error code. like -01400
array_out_of_bounds etc...

for all thse exceptions sqlcode is given(assigned by the
oracle sever)

there are pragma exceptions for which oracle has not given
the names.to assign the exception name with some oracle
defined code ...we go for pragma exceptions.

user-defined exceptions are those defined by the user.
for which the names as wel as code is given by the user.
there is some specified code range to assign to user-
defined exceptions.

Answer / guest

Exception r unwanted situations which can occur in our
program , by handling them our code become robust.

There are 2 type of exception
1) User defined
2) default or system

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