Quick Answer
The answer is to enforce HTTPS for all S3 access. This is correct because HTTPS leverages TLS encryption to protect data in transit between the S3 bucket and SageMaker, ensuring that model training data remains secure as it travels over the network. On the AWS Certified Machine Learning Engineer Associate MLA-C01 exam, this concept tests your understanding of the shared responsibility model and network-layer encryption for SageMaker workflows. A common trap is confusing server-side encryption (SSE-S3, SSE-KMS) with in-transit encryption—SSE only protects data at rest, not during transfer. Remember that HTTPS is the only way to enforce encryption in transit for S3, and SageMaker automatically uses HTTPS when you specify an S3 URI with the https:// prefix. A simple memory tip: "HTTPS for the trip, SSE for the sleep."
This MLA-C01 practice question tests your understanding of ml solution monitoring, maintenance and security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company stores its model training data in Amazon S3. To meet compliance requirements, all data in transit between the S3 bucket and SageMaker must be encrypted. What should the company enforce?
Enable S3 versioning
Why wrong: Versioning does not encrypt data.
Enable S3 access logging
Why wrong: Logging does not encrypt data.
Enforce HTTPS for all S3 access
HTTPS provides encryption in transit.
Use S3 server-side encryption (SSE-S3)
Why wrong: SSE-S3 encrypts data at rest, not in transit.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enforce HTTPS for all S3 access
Option C is correct because enforcing HTTPS for all S3 access ensures that data in transit between the S3 bucket and SageMaker is encrypted using TLS. This meets the compliance requirement for encrypting data in transit, as HTTPS uses TLS to protect data as it travels over the network.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Enable S3 versioning
Why it's wrong here
Versioning does not encrypt data.
Enable S3 access logging
Why it's wrong here
Logging does not encrypt data.
Enforce HTTPS for all S3 access
Why this is correct
HTTPS provides encryption in transit.
Related concept
Read the scenario before looking for a memorised answer.
Use S3 server-side encryption (SSE-S3)
Why it's wrong here
SSE-S3 encrypts data at rest, not in transit.
Common exam traps
The trap here is that candidates often confuse encryption at rest (SSE-S3) with encryption in transit (HTTPS/TLS), leading them to select Option D when the question explicitly asks about data in transit.
Detailed technical explanation
Enforcing HTTPS for S3 access can be implemented using an S3 bucket policy with a condition key like `aws:SecureTransport` set to `true`, which denies any HTTP requests. This ensures that all connections to the bucket use TLS 1.2 or higher. In a real-world scenario, if SageMaker uses the S3 endpoint directly, the HTTPS enforcement guarantees that the training data is encrypted during the entire transfer, preventing man-in-the-middle attacks.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
ML Solution Monitoring, Maintenance and Security — This question tests ML Solution Monitoring, Maintenance and Security — Read the scenario before looking for a memorised answer..
The correct answer is: Enforce HTTPS for all S3 access — Option C is correct because enforcing HTTPS for all S3 access ensures that data in transit between the S3 bucket and SageMaker is encrypted using TLS. This meets the compliance requirement for encrypting data in transit, as HTTPS uses TLS to protect data as it travels over the network.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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