Which of the following are possible sources of data for a report?

Data stored in external databases is indeed a valid source for reporting within Appian. These databases can contain vast amounts of information that can be critical for business analytics and decision-making processes. By connecting to external databases, users can extract relevant data through JDBC or OData integrations, enabling the creation of comprehensive reports that leverage existing datasets.

Reports can be designed to pull data directly from these databases, allowing users to visualize and analyze data that resides outside of Appian’s internal structure. This capability helps ensure that decision-makers have access to all relevant data regardless of its source, which is essential for effective reporting.

The other options, while related to potential data sources, do not represent traditional or direct data sources for reports. Data entered in an interface generally serves as an immediate input rather than a predefined source for reporting. Data generated from a web application or from a process model may also be used in reporting contexts, but they typically rely on the framework and structures set up within Appian rather than functioning as standalone data sources like external databases.