Question

If impact analysis indicates that the overall system could be significantly affected by system maintenance activities, why should regression testing be executed after the changes?

A. To ensure the system still functions as expected with no introduced issues
B. To ensure no unauthorized changes have been applied to the system
C. To assess the scope of maintenance performed on the system
D. To identify any maintainability issues with the code

Answer 1

Regression testing should be executed after system maintenance activities to ensure the system still functions as expected with no introduced issues.

Step-by-step explanation:

Regression testing should be executed after system maintenance activities if the impact analysis indicates a significant effect on the overall system. This is done to ensure that the system still functions as expected with no introduced issues. Regression testing involves retesting the existing functionalities to verify that the changes haven't caused any unintended side effects.

For example, if a system maintenance activity involves modifying a particular feature, regression testing will help identify any issues that might have occurred due to the changes made. By thoroughly testing the system, the team can verify that the desired changes have been implemented correctly and that no other functionalities have been affected.

As a result, option A is correct: regression testing is necessary to ensure the system still functions as expected with no introduced issues.