Quick Answer
The correct answer is AWS Systems Manager Patch Manager. This service automates OS patching on EC2 by applying updates based on a patch baseline, which defines approved or rejected patches, and can schedule maintenance windows to patch an entire fleet without manual intervention. On the CompTIA Cloud+ CV0-004 exam, this question tests your ability to match automation tasks to the right AWS service, often appearing as a scenario where you must choose between Patch Manager, AWS Config, or EC2 Auto Scaling. A common trap is confusing Patch Manager with AWS Systems Manager Run Command—remember that Patch Manager is specifically for scheduled, baseline-driven patching, while Run Command is for ad-hoc script execution. For a memory tip, think “Patch Manager = Patch Baselines + Scheduling,” which directly addresses the need for automated OS patching across a fleet.
This CV0-004 practice question tests your understanding of operations and support. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 cloud administrator needs to automate the patching of operating systems on a fleet of EC2 instances. Which AWS service should be used?
AWS Update Manager
Why wrong: No such service.
AWS Config
Why wrong: Used for configuration compliance.
Amazon Inspector
Why wrong: Used for security assessments, not patching.
AWS Systems Manager Patch Manager
Designed for automated patching.
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 Patch Manager
AWS Systems Manager Patch Manager automates the process of patching managed nodes with both security-related and other types of updates. It uses a patch baseline to define which patches should be installed and can schedule patching across a fleet of EC2 instances, making it the correct service for this task.
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 Update Manager
Why it's wrong here
No such service.
AWS Config
Why it's wrong here
Used for configuration compliance.
Amazon Inspector
Why it's wrong here
Used for security assessments, not patching.
AWS Systems Manager Patch Manager
Why this is correct
Designed for automated patching.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates may confuse Amazon Inspector (which only identifies vulnerabilities) with a patching solution, or assume 'AWS Update Manager' is a real service because it sounds plausible, when in fact the correct service is AWS Systems Manager Patch Manager.
Detailed technical explanation
Patch Manager uses SSM Agent on the EC2 instances to execute the patching operations, and it integrates with AWS Systems Manager Run Command and State Manager for scheduling. It supports both Windows Server (using Windows Update API) and Linux distributions (using yum, apt, or zypper package managers), and can generate patch compliance reports via AWS Config rules. A real-world scenario is using Patch Manager with a maintenance window to apply critical security patches to hundreds of instances during a defined downtime window, ensuring minimal disruption.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Operations and Support — study guide chapter
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FAQ
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Systems Manager Patch Manager — AWS Systems Manager Patch Manager automates the process of patching managed nodes with both security-related and other types of updates. It uses a patch baseline to define which patches should be installed and can schedule patching across a fleet of EC2 instances, making it the correct service for this task.
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 →
Same concept, more angles
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 cloud administrator needs to automate the process of patching multiple virtual machines in a private cloud. Which of the following is the best tool for this purpose?
easyWhy B: An Ansible playbook is the best tool for automating patching across multiple VMs because it is agentless, uses SSH for Linux or WinRM for Windows, and supports idempotent execution. This allows the administrator to define the desired patch state declaratively and apply it consistently across the entire fleet without manual intervention.
Last reviewed: Jun 11, 2026
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.
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