Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company uses AWS CodeDeploy to deploy a web application to a fleet of Amazon EC2 instances. The SysOps administrator needs to implement a deployment strategy that ensures zero downtime by creating a new set of instances alongside the current ones, then gradually shifting traffic to the new instances after they pass health checks. If a problem is detected, traffic can be instantly redirected back to the original instances. Which deployment configuration should the administrator use?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Rolling update
A rolling update replaces instances in batches, but it does not create a full parallel environment. Rollback requires re-running the previous deployment, which is not instantaneous.
B
Best answer
Blue/green deployment
Blue/green deployments involve provisioning a new set of instances, testing them, and then switching traffic at the load balancer or DNS level. This provides zero downtime and instant rollback if the new environment fails.
C
Distractor review
All at once deployment
The 'AllAtOnce' configuration stops all existing instances and starts new ones simultaneously, causing downtime during the transition.
D
Distractor review
Canary deployment
A canary deployment routes a small percentage of traffic to the new version initially, then gradually increases it. While it reduces risk, it does not provide an instant full rollback like blue/green, and the rollout process is slower.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
Related SOA-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A company uses Amazon CloudFront to deliver content to a global audience. The origin is an Application Load Balancer in us-east-1. The SysOps administrator wants to reduce costs by minimizing the number of requests that reach the origin server. Which action should the administrator take?
Question 2
A company runs a batch processing application on Amazon EC2 that runs for 2 hours every night. The workload can tolerate interruptions. Which EC2 purchasing option provides the lowest cost for this use case?
Question 3
A SysOps administrator needs to monitor the CPU utilization of an Amazon RDS DB instance and receive an alarm when CPU utilization exceeds 80% for 5 consecutive minutes. Which AWS service should be used to create this alarm?
Question 4
A company runs a critical web application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The application uses session stickiness (sticky sessions) to maintain user sessions. The SysOps administrator notices that when instances are replaced during a scale-in or failure event, users lose their session data. The administrator needs to preserve session data across instance failures without losing stickiness benefits. What should the administrator do?
Question 5
A company runs a production web application on a single Amazon EC2 instance. The application experiences a predictable and steady workload 24/7. The SysOps administrator wants to minimize compute costs for this instance while ensuring it remains available during the expected workload. Which EC2 purchasing option should the administrator use?
Question 6
A company has a VPC with public and private subnets. The private subnets host application servers that need to make outbound HTTPS connections to the internet. The SysOps administrator must implement a solution that provides outbound internet connectivity while preventing inbound connections from the internet. Additionally, the solution must allow the company to control which domains the application servers can access. Which solution should the administrator implement?
FAQ
Questions learners often ask
What does this SOA-C02 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Blue/green deployment — A blue/green deployment creates a new set of instances (green) and, after verifying health, shifts traffic from the current (blue) set to the green. This provides zero downtime and easy rollback by reverting traffic to blue. Rolling updates replace instances one-by-one or in batches, which can cause temporary capacity reduction but not instant rollback. All-at-once replaces all instances at the same time, causing downtime. Canary deployments shift a small percentage of traffic first, but the full shift is gradual and not as easy to roll back as blue/green.
What should I do if I get this SOA-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
Loading comments…
Sign in to join the discussion.