Which data source is used to integrate data from an external system via API?

• A. Fixed File
• B. A data management export sequence
• C. A connector
• D. Delimited File

Answer: (C)

When pulling data from an external system through an API, the appropriate mechanism is a connector. A connector acts as the interface to the external system, making API calls to fetch data, handle authentication, manage paging or batching, and map the retrieved data into OneStream’s structures. It’s designed specifically for API-based data integration, enabling ongoing, real-time or scheduled data loads from the external source.

In contrast, a fixed file or a delimited file represents file-based ingestion where data is introduced via static files rather than live API connections. A data management export sequence is a process used to export data out of OneStream or to orchestrate outward data flows, not to ingest data from an external system via API.