Quick Answer
The answer is AWS Systems Manager State Manager, as it is purpose-built for EC2 configuration management by defining and maintaining a desired instance state through associations. This service is correct because it can automatically apply configuration files from an S3 bucket to your EC2 fleet and, when combined with an EventBridge rule or Lambda trigger that detects S3 changes, it ensures updates are applied without manual intervention. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of State Manager’s event-driven associations versus other tools like Run Command (which is ad-hoc) or OpsWorks (which is a full CM platform). A common trap is choosing AWS Config, but Config only audits compliance—it does not enforce or apply configuration changes. Memory tip: think “State Manager = desired state + automatic enforcement,” and remember that S3 change events can kick off an association via EventBridge.
This DOP-C02 practice question tests your understanding of configuration management and iac. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 DevOps engineer needs to manage configuration files across a fleet of Amazon EC2 instances running Amazon Linux. The configuration files must be updated whenever they change in an S3 bucket. Which AWS service is most suitable for this task?
AWS OpsWorks for Chef Automate
Why wrong: OpsWorks requires Chef setup, which may be overkill.
AWS Systems Manager State Manager
State Manager can manage and update configurations automatically.
AWS CloudFormation
Why wrong: CloudFormation is for provisioning, not ongoing config management.
AWS Config
Why wrong: AWS Config evaluates resource compliance, not configuration management.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Systems Manager State Manager
AWS Systems Manager State Manager is the most suitable service because it provides a configuration management solution that can automatically apply and maintain the desired state of EC2 instances. It can be configured to run associations on a schedule or in response to events, such as changes to an S3 bucket, using an AWS Lambda trigger or EventBridge rule to invoke the association. This ensures that configuration files are updated whenever they change in the S3 bucket, without requiring manual intervention or a full configuration management platform.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS OpsWorks for Chef Automate
Why it's wrong here
OpsWorks requires Chef setup, which may be overkill.
AWS Systems Manager State Manager
Why this is correct
State Manager can manage and update configurations automatically.
Related concept
Read the scenario before looking for a memorised answer.
AWS CloudFormation
Why it's wrong here
CloudFormation is for provisioning, not ongoing config management.
AWS Config
Why it's wrong here
AWS Config evaluates resource compliance, not configuration management.
Common exam traps
The trap here is that candidates often confuse AWS Config (which only audits and records configuration changes) with Systems Manager State Manager (which actively enforces and applies desired configurations), leading them to select AWS Config as the answer.
Detailed technical explanation
Under the hood, State Manager uses SSM documents (e.g., AWS-RunRemoteScript or AWS-ApplyPatchBaseline) to define the desired state, and associations are evaluated based on a cron expression or a specified rate. A common real-world pattern is to use an S3 event notification to trigger an EventBridge rule, which then invokes a Lambda function that calls the StartAssociationsOnce API to force an immediate evaluation of the State Manager association, ensuring near-real-time updates. This avoids the latency of waiting for the next scheduled evaluation cycle.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Configuration Management and IaC — study guide chapter
Learn the concepts, then practise the questions
Configuration Management and IaC practice questions
Targeted practice on this topic area only
All DOP-C02 questions
1,740 questions across all exam domains
AWS Certified DevOps Engineer Professional DOP-C02 study guide
Full concept coverage aligned to exam objectives
DOP-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise DOP-C02 questions linked to Configuration Management and IaC.
Practise DOP-C02 questions linked to Resilient Cloud Solutions.
Practise DOP-C02 questions linked to Monitoring and Logging.
Practise DOP-C02 questions linked to Incident and Event Response.
Practise DOP-C02 questions linked to Security and Compliance.
Practise DOP-C02 questions linked to SDLC Automation.
Practise DOP-C02 questions linked to DOP-C02 fundamentals.
Practise DOP-C02 questions linked to DOP-C02 scenario.
Practise DOP-C02 questions linked to DOP-C02 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Systems Manager State Manager — AWS Systems Manager State Manager is the most suitable service because it provides a configuration management solution that can automatically apply and maintain the desired state of EC2 instances. It can be configured to run associations on a schedule or in response to events, such as changes to an S3 bucket, using an AWS Lambda trigger or EventBridge rule to invoke the association. This ensures that configuration files are updated whenever they change in the S3 bucket, without requiring manual intervention or a full configuration management platform.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 24, 2026
This DOP-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 DOP-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.