The answer is to create a new Lambda version, then use an alias with weighted routing to shift traffic gradually. This approach is correct because Lambda aliases allow you to split incoming requests between two function versions, enabling a canary deployment that minimizes downtime by routing only a small percentage of traffic to the new version initially, then increasing it as you monitor for errors. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of safe deployment strategies for serverless applications, specifically how to use aliases and weighted routing to avoid the brief outages that come from direct code updates or complete cutovers. A common trap is choosing to update the function code in-place, which causes a cold start and potential downtime for in-flight requests, or using a blue/green deployment without an alias, which requires manual DNS changes. Remember the memory tip: "Aliases allow gradual shifts, not abrupt lifts."
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 SysOps administrator needs to deploy a new version of a Lambda function while minimizing downtime. The function is behind an API Gateway endpoint. What is the MOST effective approach?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a new Lambda version, then use an alias with weighted routing to shift traffic gradually
Option C is correct because Lambda aliases allow traffic shifting between versions, enabling gradual deployment. Option A is wrong because updating the function code directly with a new version would cause a brief outage. Option B is wrong because it would cause a complete cutover. Option D is wrong because it adds complexity and latency.
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.
✗
Update the Lambda function code in-place and publish a new version
Why it's wrong here
In-place update causes a brief period where the old version is replaced before the new one is active.
✓
Create a new Lambda version, then use an alias with weighted routing to shift traffic gradually
Read the scenario before looking for a memorised answer.
✗
Create a new Lambda version and update the API Gateway integration to point to it
Why it's wrong here
This causes a complete cutover, not gradual traffic shifting.
✗
Deploy a new Lambda function and use an Amazon Route 53 weighted record set to distribute traffic
Why it's wrong here
Adding Route 53 adds latency and complexity; Lambda aliases are more appropriate.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a new Lambda version, then use an alias with weighted routing to shift traffic gradually — Option C is correct because Lambda aliases allow traffic shifting between versions, enabling gradual deployment. Option A is wrong because updating the function code directly with a new version would cause a brief outage. Option B is wrong because it would cause a complete cutover. Option D is wrong because it adds complexity and latency.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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