whie box and black box test

[kiran10_rm]

what is the use of white box testing, when we are doing black box testing?

what is the use of Black box testing, when we are doing White box testing?

Thanks & Regards.

[duggisrinivasarao]

Black Box testing ensures that 'the product built is correct.'

It is a software testing technique in which the internal workings of the item to be tested are not known to the tester or they are not taken into consideration.

White Box Testing ensures that 'the product is built in a correct way'

It is a software testing technique in which an explicit knowledge of the internal workings of the item to be tested are tested.

I hope the info is useful.