Answer / varshab

Bug & defect is same.many people think that these are two
different things.If you still have any doubt abt it You can
refer ISTQB syllabi for it.These are just two terms used
for same thing.It is also called as Incident or Fault.

Bug/Defect : It is flaw in component or system which can
cause component or system to fail to perform its required
operation.

You should also know defination of error & failure to
understand these terms clearl.

Error : Incorrect human action.

Failure : Departure from expected behaviour.

User made mistakes while using software that result in
error.then because of this error system fails to perform
its intended operation so it leads to defect/Bug .If these
Bug occured during execution system can fail so bug leads
to failure of system.

Error-> Bug - > Failure.

Answer / preeti

Bug : Any missing functanility on any action that
performed by the system which is not supposed to do:
"Is an error found before the application goes to
production"
*wrong functanility *Extra or Unwanted Functanilty.
* Missing functanility .

Defect: A defect is the varience from the desired attribute
of a system or application.
"Is an error found after the application goes into
production"
* Defect from product specification.
* variance from user expectation.

Answer / chaitanya

A bug is an error, mistake, failure in a computer program
that prevents it from working as intended. Bugs arise from
mistakes and errors made by people, in either a program's
source code or its design.

A defect is one that causes a reproducible malfunction. A
malfunction is considered reproducible if it occurs
consistently under the same circumstances.

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