easyMultiple SelectObjective-mapped
MLA-C01 Practice Question: A company stores training data in Amazon S3 and…
A company stores training data in Amazon S3 and uses Amazon SageMaker for model training. They need to ensure data is encrypted at rest. Which THREE encryption options are supported by SageMaker for data stored in S3? (Choose THREE.)
⚠ Common exam trap
Test-takers frequently confuse client-side encryption (which is not a server-side S3 encryption option) with server-side encryption options, or they mistakenly think CloudFront encryption applies to S3 data at rest, when it only applies to data in transit between CloudFront and viewers.
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
✓
SSE-C (customer-provided keys)
Amazon SageMaker supports SSE-C (server-side encryption with customer-provided keys) for data stored in S3. When using SSE-C, you manage the encryption keys and provide them to SageMaker during training job configuration. SageMaker uses these keys to decrypt the data on your behalf, ensuring data is encrypted at rest in S3 while you retain control of the encryption keys.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
SSE-C (customer-provided keys)
Why this is correct
SageMaker supports SSE-C, but the user must provide the key during training.
- ✗
Client-side encryption
Why it's wrong here
SageMaker cannot automatically decrypt client-side encrypted data.
- ✓
SSE-KMS (KMS-managed keys)
Why this is correct
SageMaker supports SSE-KMS with appropriate KMS key permissions.
- ✗
Amazon CloudFront encryption
Why it's wrong here
CloudFront is for content delivery, not storage encryption.
- ✓
SSE-S3 (S3-managed keys)
Why this is correct
SageMaker can read data encrypted with SSE-S3.
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 |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This MLA-C01 practice question is part of Courseiva's free Amazon Web Services 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 MLA-C01 exam.