Asystems development technique that tests system concepts and provides an opportunity to examine input, output, and user interfaces before final decisions are made.

Prototyping

Explanation:Prototyping is the software activity in which there is the production of the prototypes which has the incomplete form of application .It is used for the development of the real-world operating system and used in the field of the software development. It provides the benefit to the user by examining about the product's reliability , output, input etc .

answer; always; never;