Testing Level - System Testing

3) System Testing

System Testing is third level of Testing In this level we check Functionality of application

"System testing concentrates on testing the complete system with a variety of techniques and methods. System Testing comes into picture after the Unit and Integration Tests."

"To verify and validate behaviors of the entire system against the original system objectives "

System level testing :
Once the application is deployed into the environment then if one performs testing on the system it is known as system level testing it is a black box testing and usually done by the test engineers.At this level of testing so many types of testing are done.
Some of those are

* Integration Testing
* Load Testing
* Performance Testing
* Stress Testing etc….

During system testing it costs even more time and may delay delivery. Finally, during operations it may cause anything from a nuisance to a system failure, possibly with catastrophic as an aircraft or an emergency service.