PAS-C01 Operations and Maintenance Practice Question
A company is running SAP ERP on AWS and uses SAP HANA as the database. The system administrator needs to apply an OS patch that requires a reboot. The SAP HANA database is running in a scale-out configuration across multiple EC2 instances. What is the best approach to minimize downtime?
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
✓
Perform a rolling reboot of the HANA nodes, rebooting one node at a time.
SAP HANA scale-out supports rolling updates; rebooting one node at a time allows the database to remain operational during the patching process. Option B is wrong because taking EBS snapshots is a backup step, not a method to apply the patch with minimal downtime. Option C is wrong because creating an AMI and launching a new instance introduces unnecessary complexity and still causes downtime for the master node. Option D is wrong because stopping all instances results in full downtime, which contradicts the goal of minimizing downtime.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Perform a rolling reboot of the HANA nodes, rebooting one node at a time.
Why this is correct
Correct. Performing a rolling reboot allows the HANA database to remain online by rebooting nodes sequentially, ensuring availability during patching.
- ✗
Take EBS snapshots of all volumes before patching, then patch one by one.
Why it's wrong here
EBS snapshots are for backup, not for minimizing downtime during patching.
- ✗
Create an AMI of the master node and launch a new instance with the patch applied.
Why it's wrong here
Incorrect. Creating an AMI of the master node and launching a new instance does not provide a seamless update and requires manual failover, causing more downtime than a rolling reboot.
- ✗
Stop all EC2 instances, apply the patch, and start them in sequence.
Why it's wrong here
Stopping all instances causes full database downtime.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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