PAS-C01 Operations and Maintenance Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. 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.
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?
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
Option C is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Detailed technical explanation
How to think about this question
Under the hood, AWS Systems Manager Patch Manager uses SSM Agent on each EC2 instance to apply patches based on a patch baseline, and when combined with an Auto Scaling group's rolling update, it leverages the group's lifecycle hooks or instance refresh capabilities to replace instances in a controlled manner. This ensures that the SAP system's availability is maintained by keeping a minimum number of healthy instances running during the update, which is crucial for SAP's high-availability architecture that often relies on multiple application servers.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Operations and Maintenance — This question tests Operations and Maintenance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Systems Manager Patch Manager with a maintenance window and configure the Auto Scaling group to perform a rolling update — Option C is correct because 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.
What should I do if I get this PAS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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