The -white box testing- methodology enforces what kind of restriction?

A. The internal operation of a system is completely known

to the tester.

B. Only the external operation of a system is accessible to the tester.

C. Only the internal operation of a system is known to the tester.

D. The internal operation of a system is only partly accessible to the tester.

White-box t

esting (also known as clear box testing, glass box testing, transparent box testing, and structural testing) is a method of testing software that tests internal structures or workings of an application, as opposed to its functionality (i.e. black-box testi

ng). In white-box testing an internal perspective of the system, as well as programming skills, are used to design test cases.

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