What types of applications can be created in OutSystems?

OutSystems is designed to support the development of various types of applications, making it a versatile platform for developers. The correct answer highlights that developers can create four distinct types of applications: Web applications, Mobile applications, Service applications, and Extensions.

Web applications are designed for traditional web browsers and can be accessed on any device with internet connectivity. Mobile applications, on the other hand, are specifically tailored for mobile devices, allowing for optimized user experiences on smartphones and tablets. Service applications refer to back-end functionalities that can expose services, which might be utilized by web or mobile applications, thereby allowing for seamless integration and interoperation.

Additionally, Extensions allow developers to leverage custom code or existing libraries, providing the capability to expand the platform's functionalities when standard tools don't meet specific needs. This extensibility is crucial for integrating third-party services or utilizing custom components.

In contrast, other answer options fall short of capturing the comprehensive range of applications possible in OutSystems. For instance, while "Module and Extension" encompasses parts of the development environment, it neglects the real application types (Web, Mobile, Service) that users will interact with. Likewise, stating "Only Web" vastly limits the capabilities of the platform. This breadth of application support is one of OutSystems