Databricks-DE-Pro Data Security and Compliance Practice Question
A data engineer is configuring a Unity Catalog external location to allow access to an S3 bucket. The security team requires that all access to the bucket be authenticated using a specific IAM role, and that the credentials not be stored in Databricks. Which Unity Catalog object should the engineer create to meet this requirement?
⚠ Common exam trap
Test-takers frequently confuse instance profiles, which are used for cluster-level S3 access outside Unity Catalog, with storage credentials, which are the Unity Catalog mechanism for external locations.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A storage credential that assumes the IAM role using AWS STS.
Unity Catalog storage credentials are the correct object for authenticating to cloud storage. They reference an IAM role that Databricks assumes via AWS STS, providing temporary credentials without storing secrets. External locations then reference the storage credential and define the bucket path. This design meets the requirement of using a specific IAM role and avoiding stored credentials.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A storage credential that assumes the IAM role using AWS STS.
Why this is correct
A Unity Catalog storage credential encapsulates an IAM role that Databricks assumes using AWS STS to obtain temporary credentials. This avoids storing long-lived credentials in Databricks and allows the security team to control access via the IAM role's trust policy. It is the correct way to authenticate access to an S3 bucket from Unity Catalog.
- ✗
A storage credential that references the IAM role via an instance profile.
Why it's wrong here
Instance profiles are used for AWS clusters to access S3, but they are not the Unity Catalog mechanism for external locations. Unity Catalog uses storage credentials that assume an IAM role, not instance profiles, to provide temporary credentials. Using an instance profile would not integrate with Unity Catalog's governance model and could bypass Unity Catalog access controls.
- ✗
A service principal with an attached IAM role in AWS.
Why it's wrong here
A Databricks service principal is an identity for running jobs and accessing Databricks resources, but it does not directly authenticate to AWS S3. Access to S3 from Unity Catalog is mediated by a storage credential that assumes an IAM role. A service principal alone would not provide the required S3 authentication mechanism.
- ✗
An external location that directly embeds the IAM role's access key and secret key.
Why it's wrong here
Embedding long-lived access keys in an external location is not supported and violates the requirement to avoid storing credentials in Databricks. Unity Catalog external locations reference a storage credential, which in turn references an IAM role. Storing keys would be a security risk and is not the intended design.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Databricks exam blueprint
This Databricks-DE-Pro practice question is part of Courseiva's free Databricks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the Databricks-DE-Pro exam.