Which concept is related to the transfer of data across interfaces?

The chosen answer highlights the significance of integration level testing, which focuses on the interactions between different modules or components of a system. This type of testing is important because it assesses how data is passed and transferred across various interfaces, ensuring they communicate effectively and meet specified requirements.

Integration testing is typically conducted after unit testing, where individual components are tested in isolation. In contrast, integration testing evaluates sets of integrated components to detect interface defects, data flow issues, and other integration problems that could arise when modules work together.

This phase is crucial for identifying issues that may not surface during unit testing, as individual modules may function well on their own, but their interaction can introduce complications. By verifying the transfer of data across interfaces, integration testing helps ensure that the entire system operates as intended, leading to better overall software quality and performance. It fosters collaboration, as developers must understand how different parts of the application will interact with each other.