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Give at least three example in which black box testing might give an impression that every thing is ok,white box might uncover bug.give at least three example in which white box testing might give an impression that every thing is o.k, black box might uncover an error.
White-Box-Testing: this is done by the developer himself.
Eg. Imagine a program function that that contains the programming constructs like conditional blocks, iterative blocks etc. A developer has to test if these programming constructs are placed correctly and carries out the required action or not. This kind of testing at the detailed level is called white-box-testing.:D
Black-Box-Testing: this is done by a test engineer.
Eg. Imagine that the above program function is implemented. The tester has to check if this program function works fine in coordination with other parts of the s/w and works correctly on the input arguments and gives correct output.:cool:
Hi
Black box : No need to write code simply he will test the login pages .
White BOx he has t ohave knoweledhe on coding in some companies we have to know the coding also some times we have t odo it.
Sarnam, White box and black box both uncover different types of errors , so, need not to explain it.
The question may be modified in a way give example of bugs which are same when uncovered by both type of testing.