What is the minimum number of modules an application should have?

An application in OutSystems must have at least one module to function. A module serves as a container for various elements such as screen components, logic, and data models that are necessary for the application to operate.

When developing an application, the main module typically contains the foundational parts needed for the application to launch and execute its core functionalities. Without a module, there would be no organization of these essential components, making it impossible to create a deployable and runnable application.

The other choices suggest that an application could have fewer than one module, which is not feasible, as an application cannot exist without any structure or components to work with. Thus, a minimum of one module is essential for any OutSystems application development.