DOP-C02 Configuration Management and IaC Practice Question
A company uses AWS Systems Manager to manage configuration compliance. They want to ensure that all EC2 instances have a specific security patch installed. Which Systems Manager capability should they use?
⚠ Common exam trap
Watch out — candidates often confuse State Manager (which manages configuration state) with Patch Manager (which specifically handles patch compliance), or they assume Automation can handle patching because it can run scripts, but Patch Manager provides the dedicated patching workflow and compliance reporting.
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
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Patch Manager
Patch Manager is the correct Systems Manager capability because it is specifically designed to automate the process of patching managed instances with security updates and other types of patches. It can scan for missing patches and enforce compliance by applying patches on a schedule or on demand, directly addressing the requirement to ensure all EC2 instances have a specific security patch installed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Automation
Why it's wrong here
AWS Systems Manager Automation is a general-purpose runbook engine that lets you define multi-step workflows for tasks like instance recovery or AMI creation. Although you could script a patch-installation sequence in a custom runbook, Automation itself does not natively scan managed nodes against patch baselines or track patch compliance. Patching is a specialized capability that Patch Manager provides out of the box, so Automation is not the service designed for this requirement.
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Parameter Store
Why it's wrong here
Parameter Store is a secure, hierarchical service for storing configuration data, secrets, and plaintext values that applications can retrieve at runtime. It has no ability to execute commands or install software on managed instances, nor does it understand OS patch metadata or patch baselines. Because the task is to manage configuration by applying patches, Parameter Store only stores data and cannot perform the patching operation itself, making it incorrect.
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State Manager
Why it's wrong here
State Manager is used to define and enforce a desired state for managed nodes, typically through associations that run SSM documents on a schedule. While you can create a State Manager association that invokes Patch Manager to apply patches, State Manager itself is merely the orchestration layer; the actual patch scan, approval, and installation logic lives in Patch Manager. Therefore, State Manager is too generic for the specific purpose of automating patch management.
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Patch Manager
Why this is correct
Patch Manager is the purpose-built Systems Manager capability that automates the process of patching managed nodes. It uses patch baselines to determine which patches are approved or rejected, and it can either scan for missing patches or install them directly on EC2 instances and on-premises servers. Patch Manager supports both Linux and Windows, integrates with maintenance windows and compliance reporting, and is the correct answer because it directly handles patch configuration and deployment.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.