Which type of testing is performed on functionally grouped components to ensure that the subset works with the entire system?

Which type of testing is performed on functionally grouped components to ensure that the subset works with the entire system?

• A. System
• B. Unit
• C. Integration
• D. User acceptance

Answer: (C)

Testing how multiple functionally grouped components interact to work together within the whole system is done through integration testing. This type of testing focuses on interfaces, data exchange, and the flow of operations across modules, ensuring that when these parts come together, the combined behavior matches expectations. It sits after unit testing—where each component is checked in isolation—and before system testing, which looks at the fully integrated product as a whole. By validating the interactions, integration testing catches issues like mismatched data formats, incorrect API usage, or timing problems that wouldn’t appear when testing components alone. For example, in healthcare IT, you’d verify that a new lab results module correctly formats and sends data to the electronic health record, triggers the appropriate alerts, and doesn’t disrupt other workflows.

Testing how multiple functionally grouped components interact to work together within the whole system is done through integration testing. This type of testing focuses on interfaces, data exchange, and the flow of operations across modules, ensuring that when these parts come together, the combined behavior matches expectations. It sits after unit testing—where each component is checked in isolation—and before system testing, which looks at the fully integrated product as a whole. By validating the interactions, integration testing catches issues like mismatched data formats, incorrect API usage, or timing problems that wouldn’t appear when testing components alone. For example, in healthcare IT, you’d verify that a new lab results module correctly formats and sends data to the electronic health record, triggers the appropriate alerts, and doesn’t disrupt other workflows.