what is the difference between Error,Defect,Bug,Failure

Answer Posted / veena nair

If we're talking about a problem that exists in the design
of DNS or
in a particular implementation, we should call it
a "defect" (this is
the standard term among the safety engineers for what we
programmers
informally call a "bug"). If we're talking about a problem
that
exists at run-time, when something goes wrong internally,
we should
call it a "fault". If we're talking about somebody getting
ripped off
because they relied on DNS and a criminal exploited DNS,
then we
should call it a "failure".

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