The answer is an IAM role with Systems Manager permissions and the SSM Agent installed and running on the EC2 instance. These two prerequisites are non-negotiable because Patch Manager relies on the SSM Agent to execute patch commands on the operating system, while the IAM role provides the necessary API authorization for the agent to communicate back to the Systems Manager service. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this concept frequently appears as a distractor trap where candidates assume a public subnet or a specific OS is required, but Patch Manager works with any supported OS and does not mandate public internet access if using a VPC endpoint. A common memory tip is to remember the two pillars: “Agent on the box, IAM on the role”—without both, Patch Manager simply cannot initiate or report patch operations.
PAS-C01 Migration Practice Question
This PAS-C01 practice question tests your understanding of migration. 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 company is migrating a SAP system to AWS and wants to use AWS Systems Manager for patching. Which TWO prerequisites are required to use AWS Systems Manager Patch Manager?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The AWS Systems Manager Agent (SSM Agent) must be installed on the EC2 instance.
Correct options are A and D. The SSM Agent must be installed and running on the EC2 instances, and the instances must have an IAM role that grants Systems Manager permissions. Option B is wrong because Patch Manager does not require the instance to be in a public subnet. Option C is wrong because Patch Manager works with both Amazon Linux and Windows. Option E is wrong because Patch Manager does not require a reboot schedule.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The EC2 instance must be in a public subnet.
Why it's wrong here
Instances can be in private subnets with VPC endpoints.
✗
The EC2 instance must be running Amazon Linux 2.
Why it's wrong here
Patch Manager supports multiple OS.
✓
The AWS Systems Manager Agent (SSM Agent) must be installed on the EC2 instance.
Why this is correct
SSM Agent is required for Systems Manager to manage the instance.
A maintenance window must be configured with a reboot option.
Why it's wrong here
Maintenance window is optional.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PAS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
Migration — This question tests Migration — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: The AWS Systems Manager Agent (SSM Agent) must be installed on the EC2 instance. — Correct options are A and D. The SSM Agent must be installed and running on the EC2 instances, and the instances must have an IAM role that grants Systems Manager permissions. Option B is wrong because Patch Manager does not require the instance to be in a public subnet. Option C is wrong because Patch Manager works with both Amazon Linux and Windows. Option E is wrong because Patch Manager does not require a reboot schedule.
What should I do if I get this PAS-C01 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PAS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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 →
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.
This PAS-C01 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 PAS-C01 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.