Which class type is primarily concerned with user interactions within a Pega application?

The work class is primarily concerned with user interactions within a Pega application. This class is designed to manage an instance of work that represents an ongoing process or task in the application. It facilitates the interaction between users and the application, where users can create, update, and resolve cases.

Work classes are crucial for defining the behavior of cases, including how they appear to users and how they can be manipulated throughout their lifecycle. This includes defining the user interfaces, managing business logic, and guiding users through the necessary steps to complete their work. Thus, the work class serves as the central point for case management and user interaction within Pega applications, ensuring that the experience is seamless and efficient for the end-users.

In contrast, the other class types focus on different aspects of the application. Data classes are used to manage data entities and their attributes, integration classes handle connections to external systems, and service classes are focused on the back-end processes that handle requests and responses for services within the application. While all are important in the architecture of a Pega application, the work class is uniquely positioned to drive user interactions.