Can you modify data in an external entity?

The correct answer highlights a key feature of external entities within Mendix. When working with external entities, it is indeed possible to modify data provided that the Updateable (write) property of its public resource settings is enabled. This property essentially allows external access to the entity for modification purposes.

When an external entity is configured with the Updateable option checked, it signals that users or applications can perform write operations, such as creating, updating, or deleting records. This flexibility is valuable for integrating external data sources with the Mendix application, thus enabling a more dynamic and interactive experience for the end user.

This response also reflects an understanding of permissions and roles within Mendix. While permissions play a crucial role in controlling access to various functionalities, the specific configuration setting of the external entity's Updateable property is the decisive factor for allowing modifications. Therefore, if this property is set correctly, users will have the ability to alter the data in the external entity as required.