is a type of testing for information systems that involves programmers checking the functionality of small modules of code during the development phase of the systems development life cycle (SDLC).

Unit testing

Explanation:

The SDLC or the software development life cycle is a series of processes all software application must follow from birth to death of the application.

There are several stages in SDLC, they are research, design, implementation or development, deployment and maintenance. The development stage consist of case writing and testing. Examples of testing methods used are system testing and unit testing.

Unit testing involves programmers checking the functionality of small modules of code in the development phase, while system testing checks the functionality of all the small modules of code of the entire system of the information system.

well cos like a ds it doesn't really die out, unlike for example, fifa, they always come out with a new version, so lets say your fifa 18 is charging you to update the teams and stuff, so, if messi were to go to real madrid (never gonna happen) it would switch messi to the other team, until the owners of fifa come out with fifa 19, then the game would eventually stop updating, and back to the ds, it doesn't really stop working after sometime because there's lots of things that it could be used for, and idk if u know what i'm saying, but long story short, samsung, represents the ds, if they still work, and people love them but not the new version, the old version still works, so they don't really force people to buy new phones, get me?