Difference between defect, error and failure?

Question

What is difference between defect, error and failure?

Satyapriya Nayak · Answer

Error : A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition. See: anomaly, bug, defect, exception, and fault Failure: The inability of a system or component to perform its required functions within specified performance requirements. See: bug, crash, exception, fault. Bug: A fault in a program which causes the program to perform in an unintended or unanticipated manner. See: anomaly, defect, error, exception, fault. Fault: An incorrect step, process, or data definition in a computer program which causes the program to perform in an unintended or unanticipated manner. See: bug, defect, error, exception. Defect: Mismatch between the requirements. http://software-testing-faq.blogspot.in/2007/08/difference-between-defecterrorbugfailur.html http://www.sqatester.com/bugsfixes/bugdefecterror.htm

nallya · Answer

Difference between defect,error,bug,failure and fault Error : A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition. See: anomaly, bug, defect, exception, and fault Failure: The inability of a system or component to perform its required functions within specified performance requirements. See: bug, crash, exception, fault. Bug: A fault in a program which causes the program to perform in an unintended or unanticipated manner. See: anomaly, defect, error, exception, fault. Fault: An incorrect step, process, or data definition in a computer program which causes the program to perform in an unintended or unanticipated manner. See: bug, defect, error, exception. Defect: Mismatch between the requirements. SOURCE:http://software-testing-faq.blogspot.in/2007/08/difference-between-defecterrorbugfailur.html