Here I am trying to explain what is the difference between Error, Defect and Bug in Testing.
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Bug Life Cycle and
If a developer finds a mistake in coding then that mistake is called as Error/Flaw.
If a tester detected any mistake in software coding then that mistake is called as Defect/Issue.
If a testers defect was accepted by developers to fix then the defect is called as Bug. Sometime customer facing problems in software after release that is also called as Bug.
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(Installation & Features)