What is Black box and White box testing?

What is Black box and White box testing?

Newbie Asked on September 26, 2018 in Programmer.
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Criteria Black Box Testing White Box Testing
Definition Black Box Testing is a software testing method in which the internal structure/ design/ implementation of the item being tested is NOT known to the tester White Box Testing is a software testing method in which the internal structure/ design/ implementation of the item being tested is known to the tester.
Levels Applicable To Mainly applicable to higher levels of testing:Acceptance Testing
System Testing

Mainly applicable to lower levels of testing:Unit Testing
Integration Testing

Responsibility Generally, independent Software Testers Generally, Software Developers
Programming Knowledge Not Required Required
Implementation Knowledge Not Required Required
Basis for Test Cases Requirement Specifications Detail Design

Newbie Answered on September 26, 2018.
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In Black-box testing, a tester doesn’t have any information about the internal working of the software system. Black box testing is a high level of testing that focuses on the behavior of the software. It involves testing from an external or end-user perspective. Black box testing can be applied to virtually every level of software testing: unit, integration, system, and acceptance

White-box testing is a testing technique which checks the internal functioning of the system. In this method, testing is based on coverage of code statements, branches, paths or conditions. White-Box testing is considered as low-level testing. It is also called glass box, transparent box, clear box or code base testing. The white-box Testing method assumes that the path of the logic in a unit or program is known.

Newbie Answered on September 26, 2018.
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Black-box testing checks if the desired outputs are produced when valid input values are given. It does not verify the actual implementation of the program.

White-box testing not only checks for desired and valid output when valid input is provided but also it checks if the code is implemented correctly.

Newbie Answered on September 26, 2018.
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