During an architecture review, a new data engineer must explain how three Unity Catalog objects work together for cloud storage: the object that holds the IAM credential, the object that registers a storage path for external tables, and the object that gives notebooks governed access to files. Which explanation is correct?

1. A. Volumes have replaced external locations entirely, so a single volume type now covers both the registration of storage paths for tables and practical access to files. 💬 A
2. B. Storage credentials point to the catalogs that use them and carry the privilege to run queries against those catalogs. 💬 B
3. C. External locations store the IAM credentials of every external table registered under them, one credential per table. 💬 C
4. D. Storage credentials hold the IAM credential, external locations register a storage path referencing it, and volumes give governed access to files. ✓ D

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Resposta correta: Storage credentials hold the IAM credential, external locations register a storage path referencing it, and volumes give governed access to files.

Referência: https://docs.databricks.com/aws/en/data-governance/unity-catalog/