SOLID is the acronym form of the first five principle of object oriented programming. It basically provide the high cohesive units and used in the testing purpose. The SOLID principle combined together to develop a software easily and it is easy to maintain.
By applying the SOLID principle it makes easy to understand it also provide the better quality in the software. Therefore, violating the SOLID principle it become difficult the code to test.
The modern world has numerous kinds of systems that influence daily life. Some examples include transport systems; solar systems; telephone systems; the Dewey Decimal System; weapons systems; ecological systems; space systems; etc.
