- A
Update the Lambda function code in-place and publish a new version
Why wrong: In-place update causes a brief period where the old version is replaced before the new one is active.
- B
Create a new Lambda version, then use an alias with weighted routing to shift traffic gradually
Weighted aliases allow incremental traffic shift, minimizing downtime.
- C
Create a new Lambda version and update the API Gateway integration to point to it
Why wrong: This causes a complete cutover, not gradual traffic shifting.
- D
Deploy a new Lambda function and use an Amazon Route 53 weighted record set to distribute traffic
Why wrong: Adding Route 53 adds latency and complexity; Lambda aliases are more appropriate.
Question 522 of 1,546
SOA-C02 Lambda Alias 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. A key principle to apply: lambda Alias. 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 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
✓
Create a new Lambda version, then use an alias with weighted routing to shift traffic gradually
Option B is correct because Lambda aliases support weighted routing, allowing traffic to be gradually shifted between function versions. This enables zero-downtime deployments by initially sending a small percentage of requests to the new version, monitoring for errors, and then increasing traffic. Option A is incorrect because updating the function code in-place would directly overwrite the existing version and risk a brief outage with no easy rollback. Option C is incorrect because manually updating the API Gateway integration to point to a new version causes a complete cutover, which may result in a short outage or require careful timing. Option D is incorrect because using Route 53 weighted records adds unnecessary latency and complexity; it is not the optimal approach for a single Lambda function behind API Gateway.
Key principle: Lambda Alias
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
Why this is correct
Weighted aliases allow incremental traffic shift, minimizing downtime.
Related concept
Lambda Alias
- ✗
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
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Lambda Alias
- Weighted Routing
- Zero-Downtime Deployment
- API Gateway Integration
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
Lambda Alias
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. Lambda Alias Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Lambda Alias.
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 B is correct because Lambda aliases support weighted routing, allowing traffic to be gradually shifted between function versions. This enables zero-downtime deployments by initially sending a small percentage of requests to the new version, monitoring for errors, and then increasing traffic. Option A is incorrect because updating the function code in-place would directly overwrite the existing version and risk a brief outage with no easy rollback. Option C is incorrect because manually updating the API Gateway integration to point to a new version causes a complete cutover, which may result in a short outage or require careful timing. Option D is incorrect because using Route 53 weighted records adds unnecessary latency and complexity; it is not the optimal approach for a single Lambda function behind API Gateway.
What should I do if I get this SOA-C02 question wrong?
Review lambda Alias, then practise related SOA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Lambda Alias
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Last reviewed: Jun 20, 2026
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