All about Negative Testing and its Aftereffect

Is there anything called Negative Testing?
This question might pull a range of answers from software testers with contrasting skill sets and experiences. However, it can even puzzle few conventional testers or neophytes. In spite of being a creepy subject, this question can be asked in any of the software testing interviews.
read more: http://www.360logica.com/blog/2015/02/all-about-negative-testing-and-its-aftereffect.html