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What is boundary condition testing?

In all software applications, bugs most often emerge at boundary conditions. QA Engineer should carefully select test data in which values lie along data extremes. Boundary values usually contain maximum, minimum, and just inside outside boundaries. If selected test case work correctly for these special cases, then they will probably work correctly for all other values.

The technique of boundary condition analysis requires in-depth understanding of what the system is doing behind the tricky user interface, and cautious investigation of software system and data to correctly establish the precise boundary conditions. After that testers can perform a additional methodical analysis of any recognized boundary conditions and potentially increase likelihood of identifying real issues caused by this specific test model.

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Common QA engineer interview questions