This MLS-C01 practice question tests your understanding of modeling. 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 deploying a model using Amazon SageMaker and wants to automatically scale the endpoint based on the number of incoming requests. Which scaling policy should be used?
Step scaling
Why wrong: Step scaling is more complex.
Scheduled scaling
Why wrong: Scheduled scaling is for predictable traffic.
Target tracking scaling
Target tracking automatically adjusts capacity based on a target metric.
Simple scaling
Why wrong: Simple scaling requires manual thresholds.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Target tracking scaling
SageMaker endpoints support Application Auto Scaling, which can use a target tracking scaling policy based on a metric like InvocationsPerInstance. Simple scaling and step scaling are also possible but target tracking is simpler. Scheduled scaling is for predictable traffic. Option A: Target tracking scaling is correct. Option B: Simple scaling requires manual thresholds. Option C: Step scaling is more complex. Option D: Scheduled scaling is for predictable patterns.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Step scaling
Why it's wrong here
Step scaling is more complex.
Scheduled scaling
Why it's wrong here
Scheduled scaling is for predictable traffic.
Target tracking scaling
Simple scaling
Why it's wrong here
Simple scaling requires manual thresholds.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MLS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Modeling — This question tests Modeling — Static NAT maps one inside address to one outside address..
The correct answer is: Target tracking scaling — SageMaker endpoints support Application Auto Scaling, which can use a target tracking scaling policy based on a metric like InvocationsPerInstance. Simple scaling and step scaling are also possible but target tracking is simpler. Scheduled scaling is for predictable traffic. Option A: Target tracking scaling is correct. Option B: Simple scaling requires manual thresholds. Option C: Step scaling is more complex. Option D: Scheduled scaling is for predictable patterns.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MLS-C01 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This MLS-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 MLS-C01 exam.
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