"When given the option, I prefer functional testing to verify my code. This is because a functional test confirms that the product we developed works and performs the tasks we redesigned it for. The alternative is acceptance testing. This validates that we developed the product that the end-user requested and needs. It typically addresses whether the software solves the problem for the end-user. When using functional testing, it is important to clearly understand the end-users issue and the type of software they need to address it. Doing this enables the functional test to simultaneously perform the acceptance test."