Exam CISA topic 1 question 393 discussion

Functionality testing focuses on verifying that the new system functions correctly and integrates smoothly with existing systems. It ensures that the new system does not negatively impact or interfere with the functioning of existing systems. By testing the interactions and functionality of the new system within the broader IT environment, functionality testing helps identify potential issues that could arise from integration with existing systems, thereby mitigating the risk of adverse impacts.

The purpose of sociability testing is to confirm that a new or modified system can operate in its target environment without adversely impacting existing systems.This should cover the platform that will perform primary application processing and interfaces with other systems, as well as changes to the desktop in a client- server or web development. Parallel testing is the process of feeding data into two systems-the modified system and an alternate system- and comparing the results. In this approach, the old and new systems operate concurrently for a period of time and perform the same processing functions. Pilot testing takes place first at one location and is then extended to other locations.

Sociability testing (option C) is not a common type of testing and is not directly related to the risk of a new system adversely impacting existing systems.