why a developer is not good tester?

Answer Posted / pritam

developer is the person who builds the application. He will
be blind to the errors which exist in his applications coz
he sees what he wants to see. Of course the main
functionality will be correct. It is the duty of tester to
have an eye for
all the small details and break the application by giving
in all types of data and creating all possible
scenarios.Tester test all negative entry for software. He see
and want to find any bug from software.He see the the
software with negative.

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