The answer is AWS Systems Manager State Manager, because it is the dedicated service for enforcing and maintaining a consistent configuration across a fleet of EC2 instances through desired state configurations (DSCs). State Manager automatically remediates configuration drift by re-applying the defined state on a scheduled basis, handling software packages, firewall rules, and user accounts exactly as described. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish State Manager from other Systems Manager capabilities like Patch Manager or Run Command, which lack automatic drift remediation. A common trap is choosing AWS Config, which audits compliance but does not actively enforce or remediate configurations on instances. Remember the memory tip: “State Manager sets the state and keeps it there,” contrasting with Config, which only reports on the state.
DOP-C02 Configuration Management and IaC Practice Question
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 team manages a large fleet of EC2 instances using AWS Systems Manager. They want to enforce a consistent configuration across all instances, including installed software packages, firewall rules, and user accounts. The team also needs to audit configuration changes and remediate drift automatically. Which AWS service should the team use?
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 correct choice because it is designed to enforce a consistent configuration across EC2 instances by defining and applying desired state configurations (DSCs). It can manage software packages, firewall rules, and user accounts, and it automatically remediates drift by re-applying the desired state on a schedule. This directly meets the requirement for configuration enforcement, auditing, and automated drift remediation.
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.
✗
AWS OpsWorks for Chef Automate
Why it's wrong here
OpsWorks can manage configurations but State Manager is simpler and more integrated for Systems Manager agents.
✓
AWS Systems Manager State Manager
Why this is correct
State Manager can define a desired state configuration and automatically apply it to instances.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS Systems Manager Run Command
Why it's wrong here
Run Command executes commands on demand, not on a schedule to maintain desired state.
✗
AWS Config
Why it's wrong here
AWS Config evaluates resource configurations against rules but cannot install software or manage user accounts.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing AWS Config (which only audits and detects drift) with State Manager (which enforces and remediates drift), leading candidates to choose Config because they focus on the auditing requirement without realizing it lacks enforcement capabilities.
Trap categories for this question
Command / output trap
Run Command executes commands on demand, not on a schedule to maintain desired state.
Detailed technical explanation
How to think about this question
State Manager uses associations to define a desired state (e.g., via SSM documents or custom scripts) and applies them on a configurable schedule (e.g., every 30 minutes). It leverages the Systems Manager Agent (SSM Agent) on EC2 instances to execute the state enforcement, and it logs all actions to AWS CloudTrail for auditing. A real-world scenario is enforcing a security baseline (e.g., disabling SSH root login) across a fleet of 10,000 instances, where State Manager automatically reapplies the configuration if an instance drifts due to manual changes.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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.
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Systems Manager State Manager — AWS Systems Manager State Manager is the correct choice because it is designed to enforce a consistent configuration across EC2 instances by defining and applying desired state configurations (DSCs). It can manage software packages, firewall rules, and user accounts, and it automatically remediates drift by re-applying the desired state on a schedule. This directly meets the requirement for configuration enforcement, auditing, and automated drift remediation.
What should I do if I get this DOP-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.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A DevOps team manages hundreds of EC2 instances using AWS Systems Manager State Manager. They need to ensure that a specific configuration (e.g., a custom firewall rule) is applied to all instances and remains enforced. Which THREE steps should they take? (Choose THREE.)
hard
✓ A.Ensure the instances have an IAM role that allows Systems Manager to perform actions.
✓ B.Create a State Manager association using a custom document that defines the firewall rule.
C.Use AWS Config rules to detect non-compliance.
D.Use Run Command to execute the configuration once.
✓ E.Set the association to apply the configuration on a schedule (e.g., every 30 minutes).
Why A: Options A, C, and E are correct. Option A creates a State Manager association for the configuration. Option C sets the association to apply the configuration on a schedule, ensuring enforcement. Option E uses an IAM role to allow Systems Manager to apply the configuration. Option B is wrong because Run Command is ad-hoc, not continuous enforcement. Option D is wrong because Config rules only detect, not enforce.
Variation 2. An organization uses AWS Systems Manager to manage a fleet of EC2 instances. They want to ensure that all instances have a specific software package installed. Which approach should they take?
medium
A.Use OpsCenter to create an OpsItem for each instance.
B.Use Run Command to execute the installation on all instances.
C.Create a Patch Baseline that includes the package.
✓ D.Create a State Manager association with a custom document that installs the package.
Why D: Option A is correct because State Manager associations can enforce desired configurations, such as installing software packages, on a schedule or on demand. Option B is wrong because Run Command is for one-time ad-hoc execution, not continuous enforcement. Option C is wrong because Patch Manager focuses on OS patches, not arbitrary software. Option D is wrong because OpsCenter is for operational issues, not configuration management.
Last reviewed: Jun 24, 2026
Question Discussion
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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.
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