mediumMultiple SelectObjective-mapped
AIF-C01 Practice Question: Secure data used for training machine learning…
A company needs to secure data used for training machine learning models in Amazon SageMaker. Which TWO actions should be taken to protect data at rest and in transit? (Choose TWO.)
⚠ Common exam trap
AWS often tests the distinction between data protection mechanisms (encryption) and other security controls (access management, model governance), leading candidates to confuse disabling root access or using Model Registry with data encryption requirements.
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
✓
Enable default encryption on S3 buckets using AWS KMS
Enabling default encryption on S3 buckets using AWS KMS ensures that all objects stored in the bucket are encrypted at rest. This is a fundamental security practice for protecting training data in SageMaker, as SageMaker reads data from S3. Using AWS KMS allows you to manage and audit encryption keys, providing fine-grained control over data protection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use AWS Certificate Manager (ACM) to generate certificates for all SageMaker endpoints
Why it's wrong here
ACM certs are for HTTPS endpoints but not the primary method for data protection; KMS is better for at rest.
- ✓
Enable default encryption on S3 buckets using AWS KMS
Why this is correct
This encrypts data at rest in S3.
- ✗
Disable root access on SageMaker notebook instances
Why it's wrong here
This is a security best practice but does not protect data at rest or in transit.
- ✓
Use SageMaker with VPC endpoints and enforce HTTPS for API calls
Why this is correct
VPC endpoints keep traffic within the AWS network, and HTTPS encrypts data in transit.
- ✗
Use SageMaker Model Registry to track model versions
Why it's wrong here
Model Registry is for governance, not encryption.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AIF-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 AIF-C01 exam.