Which statement about Blocks in OutSystems reactive apps is accurate?

Blocks in OutSystems reactive applications serve as reusable components that encapsulate UI logic and presentation. The accuracy of the statement that blocks can be instantiated on screens and other blocks reflects the flexibility offered by the OutSystems framework in building modular applications.

When a block is created, it can not only be used within screens but can also be nested inside other blocks. This allows for a hierarchical structure where more complex components can be built by combining simpler, reusable ones. Such a design approach enhances maintainability, as changes made to a block automatically propagate through every instance of that block used in other components.

This modularity supports best practices in software development by promoting reuse, reducing code duplication, and simplifying updates across different parts of the application. The ability to design intricate interfaces using a combination of blocks provides developers with powerful tools to create interactive and efficient applications.

In contrast, the other statements do not accurately represent the capabilities of blocks. For instance, stating that blocks can only be instantiated on screens or that they can be instantiated on client actions misrepresents their intended use within OutSystems applications.