System testing is really a series of various tests whose primary purpose is to totally exercise the computer-based system. Though every check contains a totally different purpose, all work to verify that each one the system parts are properly integrated and perform allotted functions.The testing process is actually carried out to make sure that the product exactly does the same thing what is supposed to do. Testing is the final verification and validation activity. In the testing stage following goals are tried to achieve,
• To affirm the quality of the project.
• To find and eliminate any residual errors from previous stages.
• To validate the software as a solution to the original problem.
• To provide operational reliability of the system. …show more content…
This is actually a single Java statement: cluster.shutdown();

6.2 Unit Testing
Unit testing which is a method of testing the accurate functioning of a particular module of the source code. Here each module that comprises the overall system is tested individually. Unit testing focuses verification efforts even in the smallest unit of software design in each module. This is also known as “Module Testing”. The modules of the system are tested separately. This testing is carried out in the programming style itself. Unit testing exercises specific paths in a module’s control structure to ensure complete coverage and maximum error detection.
This test focuses on each module individually, ensuring that it functions properly as a unit. Hence, the naming is Unit Testing. In this step each module is found to work satisfactorily as regard to the expected output from the module. This testing is done to check for the individual block codes for their working.
6.4 Integration Testing
After successful completion of unit testing or module testing, individual functions are integrated into classes. Again integration of different classes takes into place and finally integration of front-end with back-end