Write Short note on White Box Testing.

White box testing is a test case design method that uses the control structure of the procedural design to derive test cases.

The White box testing is useful for finding following type of software errors:

(a) Logical errors and incorrect assumptions are inversely proportional to the portability.
(b) We often believe that a logical path is not likely to be executed when in fact it may be executed on a regular basis.
(c) Typographical errors are random. When a program is translated into programming language source code, it is likely that some typing errors will occur.