PAS-C01 Operations and Maintenance Practice Question
An operations team needs to automate the patching of EC2 instances running SAP applications. The instances are part of an Auto Scaling group. The team wants to apply patches without causing downtime to the SAP system. Which approach should they use?
⚠ Common exam trap
The trap here is that candidates might assume patching all instances simultaneously is acceptable for SAP systems, overlooking the critical requirement for zero downtime, or they might confuse CodeDeploy's application deployment capabilities with OS patching needs.
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
✓
Use AWS Systems Manager Patch Manager with a maintenance window and configure the Auto Scaling group to perform a rolling update
AWS Systems Manager Patch Manager can be integrated with an Auto Scaling group to perform a rolling update, which updates instances in batches, ensuring that the SAP application remains available throughout the patching process. This approach minimizes downtime by replacing or updating instances incrementally rather than all at once, which is critical for SAP systems that require high availability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use AWS Systems Manager Patch Manager with a maintenance window that patches all instances simultaneously
Why it's wrong here
Patching all instances simultaneously would cause downtime.
- ✗
Use AWS CodeDeploy to deploy patches as a new application version
Why it's wrong here
CodeDeploy is for application deployments, not OS patching.
- ✓
Use AWS Systems Manager Patch Manager with a maintenance window and configure the Auto Scaling group to perform a rolling update
Why this is correct
Patches can be applied during a maintenance window, and rolling updates ensure availability.
- ✗
Use AWS OpsWorks to manage patching, configuring a rolling update
Why it's wrong here
OpsWorks can manage patching but is not the primary recommendation; Systems Manager is more commonly used.
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