PAS-C01 Operations and Maintenance Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 using SAP HANA in a multi-node scale-out configuration on AWS. The operations team needs to automate the patching of the operating system on all nodes with minimal downtime. Which approach is most suitable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a rolling patching strategy: patch one node at a time after isolating it from the HANA cluster.
Using a rolling patching strategy with Auto Scaling group or custom scripts that patch one node at a time while ensuring the node is temporarily removed from the HANA cluster minimizes downtime. Option A is correct. Option B is wrong because stopping all nodes causes downtime. Option C is wrong because just using AWS Systems Manager Patch Manager patches all at once without coordination. Option D is wrong because replacing instances from an AMI is more complex and may require data reload.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Stop all HANA nodes, patch the OS on each node, then start them all together.
Why it's wrong here
This causes full downtime.
✗
Create new EC2 instances from a patched AMI and terminate the old ones.
Why it's wrong here
This involves significant effort and potential data loss.
✗
Use AWS Systems Manager Patch Manager to apply patches to all nodes simultaneously.
Why it's wrong here
Simultaneous patching can cause cluster instability.
✓
Use a rolling patching strategy: patch one node at a time after isolating it from the HANA cluster.
Why this is correct
Rolling updates minimize downtime by maintaining cluster availability.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
Operations and Maintenance — This question tests Operations and Maintenance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use a rolling patching strategy: patch one node at a time after isolating it from the HANA cluster. — Using a rolling patching strategy with Auto Scaling group or custom scripts that patch one node at a time while ensuring the node is temporarily removed from the HANA cluster minimizes downtime. Option A is correct. Option B is wrong because stopping all nodes causes downtime. Option C is wrong because just using AWS Systems Manager Patch Manager patches all at once without coordination. Option D is wrong because replacing instances from an AMI is more complex and may require data reload.
What should I do if I get this PAS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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