PAS-C01 AWS Systems Manager Patch Manager Practice Question
A company runs SAP on AWS and needs to patch the operating system of multiple EC2 instances on a schedule. The instances are part of an Auto Scaling group. Which AWS service can be used to apply patches without disrupting the Auto Scaling group's desired capacity?
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
✓
AWS Systems Manager Patch Manager
AWS Systems Manager Patch Manager can be used to apply OS patches to EC2 instances on a schedule. It integrates with Auto Scaling groups to maintain desired capacity, for example by using instance refresh to roll out patches without disrupting the group's capacity. Option B (Amazon EC2 Auto Scaling) is incorrect because it manages scaling, not patching. Option C (AWS CloudFormation) is incorrect because it is used for infrastructure provisioning, not patching. Option D (AWS CodeDeploy) is incorrect because it is for application deployments, not OS patching.
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 Systems Manager Patch Manager
Why this is correct
Patch Manager automates OS patching on a schedule.
- ✗
Amazon EC2 Auto Scaling
Why it's wrong here
Auto Scaling does not patch instances.
- ✗
AWS CloudFormation
Why it's wrong here
CloudFormation manages resources, not patching.
- ✗
AWS CodeDeploy
Why it's wrong here
CodeDeploy deploys application code.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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