Reasons behind to function the white box testing

Question

Briefly describe the reasons behind to function the white box testing?

Answer 1

There are three major reasons behind functioning the white box testing:

a) Programmers might have some wrong suppositions while designing or implementing certain functions. Due to this there are options of containing logical errors in the program. To identify and correct these logical errors procedural details require to be examined.

b) Certain suppositions on flow of control and data might lead programmer to make design errors. To uncover the errors on the logical path, the white box testing is a must.

c) There might be certain typographical errors which remain undetected even after the syntax and type checking methods. These errors can be uncovered throughout the white box testing.