Answer: V-model for software testing is referred to as a type of Systems development life cycle model under which a process tends to be executed in sequential manner i.e. V-shape. It is also referred as Verification & Validation model. This is mostly based on company of testing period for a development stage. The development of each and every step is associated with testing phase. Therefore next phase will start only, once the previous stage has been completed i.e. each development activity,has a testing activity corresponding.