- A
Create a VPC endpoint for S3 in the same VPC and subnet.
Allows private connectivity to S3.
- B
Assign a public IP address to the notebook instance.
Why wrong: Not required for S3 access via VPC endpoint.
- C
Set up a NAT gateway in the public subnet.
Why wrong: Unnecessary if using VPC endpoint.
- D
Create an IAM role with S3 access permissions and attach it to the notebook instance.
Provides identity-based permissions.
- E
Attach an internet gateway to the VPC.
Why wrong: Not needed; VPC endpoint is more secure and direct.
Question 675 of 1,000
How to Access a Private S3 Bucket from a SageMaker Notebook in a VPC
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 machine learning engineer is setting up an Amazon SageMaker notebook instance. The instance needs to access a private S3 bucket that contains training data. The notebook instance is in a VPC. Which combination of steps will grant access to the S3 bucket? (Choose TWO.)
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
✓
Create a VPC endpoint for S3 in the same VPC and subnet.
Options A and D are correct. A VPC endpoint for S3 (A) allows private access to the S3 bucket without traversing the internet, and an IAM role with S3 access permissions attached to the notebook instance (D) grants the necessary authorization. Option B (assigning a public IP) is unnecessary and not recommended for private access. Option C (NAT gateway) is not required when using a VPC endpoint. Option E (internet gateway) would expose the instance to the internet and is not needed for private S3 access.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create a VPC endpoint for S3 in the same VPC and subnet.
Why this is correct
Allows private connectivity to S3.
Related concept
Authentication checks who the user is.
- ✗
Assign a public IP address to the notebook instance.
Why it's wrong here
Not required for S3 access via VPC endpoint.
- ✗
Set up a NAT gateway in the public subnet.
Why it's wrong here
Unnecessary if using VPC endpoint.
- ✓
Create an IAM role with S3 access permissions and attach it to the notebook instance.
Why this is correct
Provides identity-based permissions.
Related concept
Authentication checks who the user is.
- ✗
Attach an internet gateway to the VPC.
Why it's wrong here
Not needed; VPC endpoint is more secure and direct.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
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.
Visual reference
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 |
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related MLA-C01 questions on access control and AAA configuration.
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ML Solution Monitoring, Maintenance and Security — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this MLA-C01 question test?
ML Solution Monitoring, Maintenance and Security — This question tests ML Solution Monitoring, Maintenance and Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Create a VPC endpoint for S3 in the same VPC and subnet. — Options A and D are correct. A VPC endpoint for S3 (A) allows private access to the S3 bucket without traversing the internet, and an IAM role with S3 access permissions attached to the notebook instance (D) grants the necessary authorization. Option B (assigning a public IP) is unnecessary and not recommended for private access. Option C (NAT gateway) is not required when using a VPC endpoint. Option E (internet gateway) would expose the instance to the internet and is not needed for private S3 access.
What should I do if I get this MLA-C01 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related MLA-C01 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 23, 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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