What is a Bug?

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Bug is a terminology used in “Software Testing”.  Most of the people in have a misconception that bug is an error or something like that. Bug is not an error but it affects the quality parameters of a software. To make you understand in a better way let me give an example.

“There is a Calculator application”. It has a “Help” button but when a user clicks on that Help button there is no function which is taking place. It means the “Help” button is just a button with no functionality. This might be due to many reasons. May be the developer has not written the code for this Calculator Help Button or it may be for different several reasons. This is found by testers in testing phase. This can be termed as a “Bug”. But note that this is not any error. This is not giving you any error when you click on the “Help” button.

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