PAS-C01 Operations and Maintenance Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 SAP administrator is troubleshooting connectivity between an SAP application server (security group sg-12345) and an SAP HANA database server. The inbound rule on the database security group is shown in the exhibit. Which additional configuration is required for the application server to communicate with the database?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Modify the network ACL to allow inbound traffic on port 3300.
Option A is correct because the rule references the source security group, but the direction is inbound; the database needs an inbound rule allowing traffic from sg-12345. Without that, traffic is blocked. Option B is wrong because the rule already references sg-12345. Option C is wrong because NACLs are stateless and need both inbound and outbound rules, but the question is about security group. Option D is wrong because the application server needs an outbound rule, not inbound.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Add an inbound rule allowing traffic from the application server's IP address.
Why it's wrong here
The security group reference is sufficient.
✗
Add an inbound rule to the application server's security group.
Why it's wrong here
The application server needs outbound rule, not inbound.
✓
Modify the network ACL to allow inbound traffic on port 3300.
Why this is correct
NACLs are stateless and must allow both inbound and outbound traffic.
Related concept
Standard ACLs match source addresses.
✗
No additional rule is needed; the rule allows traffic from sg-12345.
Why it's wrong here
The rule is inbound, so it allows traffic from sg-12345 to the database.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PAS-C01 ACL questions on filtering logic and placement.
Operations and Maintenance — This question tests Operations and Maintenance — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Modify the network ACL to allow inbound traffic on port 3300. — Option A is correct because the rule references the source security group, but the direction is inbound; the database needs an inbound rule allowing traffic from sg-12345. Without that, traffic is blocked. Option B is wrong because the rule already references sg-12345. Option C is wrong because NACLs are stateless and need both inbound and outbound rules, but the question is about security group. Option D is wrong because the application server needs an outbound rule, not inbound.
What should I do if I get this PAS-C01 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PAS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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