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Testing Interview Questions And Answers
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Q: What is integration testing?
A: Upon completion of unit testing, integration testing begins. Integration testing is black box testing. The purpose of integration testing is to ensure distinct components of the application still work in accordance to customer requirements. Test cases are developed with the express purpose of exercising the interfaces between the components. This activity is carried out by the test team. Integration testing is considered complete, when actual results and expected results are either in line or differences are explainable/acceptable based on client input. Q: What is system testing? A: System testing is black box testing, performed by the Test Team, and at the start of the system testing the complete system is configured in a controlled environment. The purpose of system testing is to validate an application's accuracy and completeness in performing the functions as designed. System testing simulates real life scenarios that occur in a "simulated real life" test environment and test all functions of the system that are required in real life. System testing is deemed complete when actual results and expected results are either in line or differences are explainable or acceptable, based on client input. Upon completion of integration testing, system testing is started. Before system testing, all unit and integration test results are reviewed by SWQA to ensure all problems have been resolved. For a higher level of testing it is important to understand unresolved problems that originate at unit and integration test levels. Q: What is end-to-end testing? A: End-to-end testing is similar to system testing, the *macro* end of the test scale; it is the testing a complete application in a situation that mimics real life use, such as interacting with a database, using network communication, or interacting with other hardware, application, or system. Q: What is regression testing? A: The objective of regression testing is to ensure the software remains intact. A baseline set of data and scripts is maintained and executed to verify that changes introduced during the release have not "undone" any previous code. Expected results from the baseline are compared to results of the software under test. All discrepancies are highlighted and accounted for, before testing proceeds to the next level. |