Quick Answer
The answer is the Elastic Beanstalk environment URL swap feature. This is correct because blue/green deployment requires two separate, fully functional environments—one serving live traffic (blue) and one running the new version (green)—and swapping their CNAME records instantly redirects all traffic to the green environment with zero downtime. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish between deployment strategies: rolling and immutable updates modify the existing environment, while a URL swap is the only native Elastic Beanstalk mechanism for a true blue/green cutover. A common trap is confusing immutable updates (which create a new Auto Scaling group but keep the same URL) with blue/green; remember that blue/green always involves a separate environment and a DNS-level swap. Memory tip: "Swap the URL, not the instances" — if you see "environment URL swap" or "CNAME swap," that’s your blue/green answer.
This DOP-C02 practice question tests your understanding of configuration management and iac. 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 company uses AWS Elastic Beanstalk to deploy web applications. The DevOps team wants to implement a blue/green deployment strategy to minimize downtime. Which Elastic Beanstalk feature should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Rolling update
Why wrong: Rolling update is not a blue/green deployment.
Canary deployment
Why wrong: Canary is not available in Elastic Beanstalk.
Environment URL swap
Swapping URLs between two environments implements blue/green.
Immutable update
Why wrong: Immutable update creates a new ASG but does not swap URLs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Environment URL swap
Option C is correct because Elastic Beanstalk supports blue/green deployments by swapping environment URLs between two environments. Option A (Rolling update) updates instances incrementally, not blue/green. Option B (Immutable update) creates a new Auto Scaling group but does not swap URLs. Option D (Canary deployment) is not supported natively in Elastic Beanstalk; it is for Lambda.
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.
Rolling update
Why it's wrong here
Rolling update is not a blue/green deployment.
Canary deployment
Why it's wrong here
Canary is not available in Elastic Beanstalk.
Environment URL swap
Why this is correct
Swapping URLs between two environments implements blue/green.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Immutable update
Why it's wrong here
Immutable update creates a new ASG but does not swap URLs.
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
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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
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 DOP-C02 NAT questions on configuration and troubleshooting.
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FAQ
Configuration Management and IaC — This question tests Configuration Management and IaC — Static NAT maps one inside address to one outside address..
The correct answer is: Environment URL swap — Option C is correct because Elastic Beanstalk supports blue/green deployments by swapping environment URLs between two environments. Option A (Rolling update) updates instances incrementally, not blue/green. Option B (Immutable update) creates a new Auto Scaling group but does not swap URLs. Option D (Canary deployment) is not supported natively in Elastic Beanstalk; it is for Lambda.
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 DOP-C02 NAT questions on configuration and troubleshooting.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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