What is the focus of integration level testing?

Integration level testing primarily focuses on ensuring that different components of a software application work together seamlessly. This type of testing involves assessing how various modules or services interact with each other, particularly concerning the transfer of data and control across program interfaces.

By conducting integration testing, testers can identify issues related to data flow and interface communication that might not be apparent when testing individual components in isolation. It's essential to verify that the individual pieces of code, which may function correctly on their own, can work together as intended within the complete system. This helps to catch bugs that could arise from the interaction between different modules, ensuring that combined functionalities are performing as expected.

In contrast, testing individual units of code relates to unit testing, verifying the functionality of user interfaces is specific to UI testing, and ensuring software meets security standards pertains to security testing. Each of these areas emphasizes different aspects of software quality assurance, but integration testing is focused specifically on the interoperability among components and the overall system behavior in response to various inputs and operations.