This DBS-C01 practice question tests your understanding of monitoring and troubleshooting. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO metrics should be monitored together to detect a memory leak in an Amazon RDS for Oracle DB instance? (Choose TWO.)
FreeableMemory
Declining freeable memory may indicate a memory leak.
SwapUsage
Increased swap usage indicates memory pressure from a possible leak.
ReadIOPS
Why wrong: ReadIOPS is an I/O metric.
DatabaseConnections
Why wrong: DatabaseConnections shows connection count, not memory usage.
NetworkThroughput
Why wrong: NetworkThroughput is not a memory metric.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
FreeableMemory
Options A and D are correct because FreeableMemory shows available memory, and SwapUsage indicates swapping, which occurs when memory is exhausted. Option B (NetworkThroughput) is not memory-related. Option C (ReadIOPS) is I/O-related. Option E (DatabaseConnections) is connection-related.
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
For each option: why learners choose it and why it is or isn't the right answer here.
FreeableMemory
Why this is correct
Declining freeable memory may indicate a memory leak.
Related concept
Standard ACLs match source addresses.
SwapUsage
Why this is correct
Increased swap usage indicates memory pressure from a possible leak.
Related concept
Standard ACLs match source addresses.
ReadIOPS
Why it's wrong here
ReadIOPS is an I/O metric.
DatabaseConnections
Why it's wrong here
DatabaseConnections shows connection count, not memory usage.
NetworkThroughput
Why it's wrong here
NetworkThroughput is not a memory metric.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Trap categories for this question
Command / output trap
DatabaseConnections shows connection count, not memory usage.
Detailed technical explanation
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.
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
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
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 DBS-C01 ACL questions on filtering logic and placement.
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FAQ
Monitoring and Troubleshooting — This question tests Monitoring and Troubleshooting — Standard ACLs match source addresses..
The correct answer is: FreeableMemory — Options A and D are correct because FreeableMemory shows available memory, and SwapUsage indicates swapping, which occurs when memory is exhausted. Option B (NetworkThroughput) is not memory-related. Option C (ReadIOPS) is I/O-related. Option E (DatabaseConnections) is connection-related.
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 DBS-C01 ACL questions on filtering logic and placement.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.
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