Which object would be best to query if you want users to view data in interfaces?

Choosing to query a record type is appropriate for allowing users to view data in interfaces because record types are specifically designed to represent a collection of data in Appian. They encapsulate data from various data source entities, define how that data is presented, and allow for structured interaction with records through interfaces.

Record types facilitate the establishment of a user-friendly display format. They can include various configurations, such as selecting fields to display, setting up related data views, and defining robust sorting and filtering options. This makes them particularly effective for creating engaging and easy-to-navigate user interfaces.

In contrast, data store entities primarily represent the underlying database tables in Appian's data layer and are not directly tailored for user interaction in interfaces. Query entities serve to provide predefined queries, but they do not have the same rich display functionality nor the modular design that record types offer for user-facing scenarios. Site entities, on the other hand, focus more on organizing and presenting a collection of interfaces and reports rather than being the direct source for displaying data in a user-friendly manner.

Thus, for building interfaces that effectively present data to users, record types are the most suitable choice due to their design and functionality catered to user interaction.