hardMultiple ChoiceObjective-mapped
MLA-C01 Practice Question: During a blue/green deployment of a SageMaker…
During a blue/green deployment of a SageMaker endpoint, the team notices that traffic is not being fully shifted to the new variant after the update. The endpoint has two variants with equal initial weights (50% each). The team wants to shift 100% traffic to the new variant. What is the most likely cause?
⚠ Common exam trap
Candidates often assume weight settings alone control traffic distribution, overlooking that SageMaker enforces health checks as a prerequisite for routing traffic to any variant.
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
✓
The new variant's model container is failing health checks, so traffic is not routed to it
SageMaker endpoints route traffic only to variants that pass health checks. If the new variant's model container fails health checks (e.g., due to a misconfigured inference script or incompatible dependencies), SageMaker will not send any traffic to it, regardless of the weight setting. This explains why traffic remains stuck at 50% on the old variant despite the intended shift to 100%.
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 new variant is using a different instance type that is not supported in the same endpoint
Why it's wrong here
Different instance types can coexist in an endpoint; this would cause the update to fail entirely.
- ✓
The new variant's model container is failing health checks, so traffic is not routed to it
Why this is correct
SageMaker performs health checks; if the new variant fails, it stays in 'Creating' state and no traffic is routed.
- ✗
The new variant's weight was set to 100 but the maximum weight per variant is 50
Why it's wrong here
There is no maximum weight of 50; weights can be set up to 100.
- ✗
The endpoint's load balancer is misconfigured and not forwarding traffic to the new variant
Why it's wrong here
SageMaker endpoints do not use a customer-managed load balancer.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.