- A
CodeDeployDefault.AllAtOnce
Why wrong: This configuration deploys to all instances simultaneously, which does not provide incremental traffic shifting with intervals.
- B
CodeDeployDefault.OneAtATime
Why wrong: This configuration shifts traffic to one instance at a time, but the interval between shifts is fixed at 5 minutes, not 10.
- C
CodeDeployDefault.HalfAtATime
Why wrong: This configuration shifts traffic in two increments of 50% with a default interval of 5 minutes, not 10.
- D
Custom deployment configuration with 25% every 10 minutes and traffic routing enabled
A custom deployment configuration allows you to define the exact percentage of traffic to shift and the interval between shifts (e.g., 25% every 10 minutes). Combined with automatic rollback on health check failure, this meets the requirements.
Quick Answer
The correct answer is a custom deployment configuration with 25% every 10 minutes and traffic routing enabled. This is because AWS CodeDeploy’s built-in configurations—AllAtOnce, OneAtATime, and HalfAtATime—only shift traffic based on instance count, not time-based intervals; only a custom deployment configuration allows you to specify both a traffic percentage and a time interval, such as shifting 25% of traffic every 10 minutes, and it supports automatic rollback if a health check fails. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of CodeDeploy’s traffic shifting options and the distinction between built-in and custom configurations—a common trap is assuming a built-in option like HalfAtATime can achieve incremental time-based shifts, but it only shifts 50% at once with no interval control. Remember the memory tip: “Custom for clock-based, built-in for count-based”—if the requirement mentions minutes or intervals, you must choose a custom configuration.
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses AWS CodeDeploy to deploy applications to Amazon EC2 instances. The administrator wants to ensure that during deployment, traffic is shifted from the original instances to the new instances incrementally in 10-minute intervals. The deployment should automatically roll back if any health check fails. Which deployment configuration should the administrator choose?
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
Custom deployment configuration with 25% every 10 minutes and traffic routing enabled
Option D is correct because it allows a custom deployment configuration that shifts traffic in 10-minute intervals (e.g., 25% every 10 minutes) with automatic rollback on health check failure. The built-in configurations (AllAtOnce, OneAtATime, HalfAtATime) do not support incremental traffic shifting with time-based intervals; only a custom configuration can achieve the specified 10-minute interval requirement.
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.
- ✗
CodeDeployDefault.AllAtOnce
Why it's wrong here
This configuration deploys to all instances simultaneously, which does not provide incremental traffic shifting with intervals.
- ✗
CodeDeployDefault.OneAtATime
Why it's wrong here
This configuration shifts traffic to one instance at a time, but the interval between shifts is fixed at 5 minutes, not 10.
- ✗
CodeDeployDefault.HalfAtATime
Why it's wrong here
This configuration shifts traffic in two increments of 50% with a default interval of 5 minutes, not 10.
- ✓
Custom deployment configuration with 25% every 10 minutes and traffic routing enabled
Why this is correct
A custom deployment configuration allows you to define the exact percentage of traffic to shift and the interval between shifts (e.g., 25% every 10 minutes). Combined with automatic rollback on health check failure, this meets the requirements.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume built-in configurations like HalfAtATime or OneAtATime can be customized with time intervals, but only a custom deployment configuration allows specifying both the percentage and the interval in minutes for traffic shifting.
Detailed technical explanation
How to think about this question
CodeDeploy's traffic routing feature uses a canary or linear deployment pattern where you define the percentage of traffic to shift and the interval (in minutes) between shifts. For example, a custom configuration of '25% every 10 minutes' shifts 25% of traffic to new instances, waits 10 minutes for health checks, then repeats until all traffic is shifted. Automatic rollback is triggered by Amazon CloudWatch alarms or deployment failure events, ensuring that if health checks fail during any interval, the deployment reverts to the original instances.
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.
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
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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Custom deployment configuration with 25% every 10 minutes and traffic routing enabled — Option D is correct because it allows a custom deployment configuration that shifts traffic in 10-minute intervals (e.g., 25% every 10 minutes) with automatic rollback on health check failure. The built-in configurations (AllAtOnce, OneAtATime, HalfAtATime) do not support incremental traffic shifting with time-based intervals; only a custom configuration can achieve the specified 10-minute interval requirement.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This SOA-C02 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 SOA-C02 exam.
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