MLS-C01 Practice Question: Machine Learning Implementation and Operations
This MLS-C01 practice question tests your understanding of machine learning implementation and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Refer to the exhibit.
resource "aws_sagemaker_notebook_instance" "ml_notebook" {
name = "my-notebook"
role_arn = "arn:aws:iam::123456789012:role/sagemaker-role"
instance_type = "ml.t2.medium"
direct_internet_access = "Enabled"
}
A DevOps engineer created a SageMaker notebook instance using the Terraform configuration shown. The notebook instance is in a VPC with a public subnet. However, the notebook instance cannot access the internet. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The subnet does not have a route to an internet gateway.
Option C is correct because a SageMaker notebook instance in a VPC with a public subnet requires a route to an internet gateway (IGW) in the subnet's route table to access the internet. Without that route, traffic from the notebook cannot reach the internet, even if `direct_internet_access` is enabled. The Terraform configuration likely omitted the route to the IGW, causing the connectivity failure.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The role_arn is incorrect or missing permissions.
Why it's wrong here
The role is for SageMaker actions, not for network connectivity.
✗
The instance type ml.t2.medium does not support internet access.
Why it's wrong here
All instance types support internet access if the network configuration allows.
✓
The subnet does not have a route to an internet gateway.
Why this is correct
Without a route to an internet gateway, the notebook cannot access the internet despite the setting.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The direct_internet_access parameter is set to 'Enabled' but should be 'Disabled'.
Why it's wrong here
'Enabled' is correct for internet access; 'Disabled' would prevent it.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse `direct_internet_access` with the actual network routing requirement, assuming the parameter alone controls internet access, when in reality it only controls whether the notebook uses a public or private subnet, and the subnet must still have proper routing to the internet gateway.
Detailed technical explanation
How to think about this question
SageMaker notebook instances in a VPC use an elastic network interface (ENI) in the specified subnet. For internet-bound traffic, the subnet's route table must have a default route (0.0.0.0/0) pointing to an internet gateway (IGW). If the VPC has a NAT gateway instead, the route would point to the NAT gateway, but the question specifies a public subnet, which typically routes directly to an IGW. Without this route, packets are dropped, and the notebook cannot reach external endpoints like PyPI or S3 (unless using a VPC endpoint).
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Machine Learning Implementation and Operations — This question tests Machine Learning Implementation and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The subnet does not have a route to an internet gateway. — Option C is correct because a SageMaker notebook instance in a VPC with a public subnet requires a route to an internet gateway (IGW) in the subnet's route table to access the internet. Without that route, traffic from the notebook cannot reach the internet, even if `direct_internet_access` is enabled. The Terraform configuration likely omitted the route to the IGW, causing the connectivity failure.
What should I do if I get this MLS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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