The correct answer is to configure VPC settings when creating the notebook instance, choosing a private subnet. This is mandatory because a private subnet has no route to an internet gateway, ensuring the notebook instance has no internet access while still allowing it to communicate with other AWS services through a VPC endpoint or NAT gateway if needed. On the AWS Certified Machine Learning Engineer Associate MLA-C01 exam, this scenario tests your understanding of network isolation for sensitive ML workloads, often appearing as a distractor where candidates mistakenly select options that assign a public IP or enable direct internet access. A common trap is assuming a private subnet alone suffices without also disabling direct internet access settings, but the key is that selecting a private subnet inherently prevents internet connectivity when no NAT or internet gateway is attached. Memory tip: think “private subnet, no internet—just VPC endpoints for service access.”
MLA-C01 Practice Question: ML Solution Monitoring, Maintenance and Security
This MLA-C01 practice question tests your understanding of ml solution monitoring, maintenance and security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 requires that all SageMaker notebook instances be created within a private VPC without internet access. Which configuration step is mandatory?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure VPC settings when creating the notebook instance, choosing a private subnet.
Option B is correct because you must choose a private subnet when creating the notebook instance. Option A would enable internet access. Option C is not a valid setting. Option D would assign a public IP, which would provide internet access.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 a SageMaker Studio notebook instead.
Why it's wrong here
SageMaker Studio also requires VPC configuration; it is not a mandatory step for reducing internet access.
✓
Configure VPC settings when creating the notebook instance, choosing a private subnet.
Why this is correct
Selecting a private subnet ensures the notebook instance is launched in the VPC without a public IP, fulfilling the requirement.
Direct internet access would allow internet traffic, which is not desired for a private VPC without internet access.
✗
Assign a public IP to the notebook instance.
Why it's wrong here
Assigning a public IP would give the instance internet access, contradicting the requirement.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related MLA-C01 subnetting questions on CIDR, address ranges, and subnet selection.
ML Solution Monitoring, Maintenance and Security — This question tests ML Solution Monitoring, Maintenance and Security — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Configure VPC settings when creating the notebook instance, choosing a private subnet. — Option B is correct because you must choose a private subnet when creating the notebook instance. Option A would enable internet access. Option C is not a valid setting. Option D would assign a public IP, which would provide internet access.
What should I do if I get this MLA-C01 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related MLA-C01 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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