Introduction
A software bug is a variance between the expected and actual results. It is a non-conformance of application behavior with the requirement. A coding error that causes an unexpected fault, a flaw in the program. If a program does not perform as intended, it is most likely a bug. There are bugs in software due to unclear or constantly changing requirements, software complexity, programming errors, errors in bug tracking, documentation errors, etc. We find bugs when we execute the test cases.
What is a bug?
A bug is an error, flaw, failure, or fault in a software application that produces an incorrect or unexpected result. Most bugs arise from mistakes and errors made by people in source code or its design. Also, a bug is a flaw usually caught in a testing environment before the application is released to the end-user.
There is a difference between software bugs and defects. Though we use the two terms interchangeably.
What is the defect?
The defect is a problem with the software application in the production environment. Defects are bugs reported by an end-user using the application. Also, defects hamper the normal functioning or execution of the software application. The defect can be either a failure of a certain function, a flaw in the design, or a fault or an error in the program.