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.
