- A
DatabaseConnections
Why wrong: DatabaseConnections measures the number of connections to the database, not I/O performance. It is not a direct indicator of I/O bottlenecks.
- B
CPUUtilization
Why wrong: CPUUtilization measures CPU usage. While high CPU can be related to I/O waits, it is not a direct I/O metric and can be caused by other factors.
- C
ReadLatency
ReadLatency measures the time taken for read I/O operations. High read latency is a direct indicator of I/O bottlenecks.
- D
WriteLatency
WriteLatency measures the time taken for write I/O operations. High write latency is a direct indicator of I/O bottlenecks.
- E
FreeStorageSpace
Why wrong: FreeStorageSpace indicates the amount of available storage, not the performance of I/O operations. It does not help identify I/O bottlenecks.
DBS-C01 Monitoring and Troubleshooting Practice Question
This DBS-C01 practice question tests your understanding of monitoring and troubleshooting. 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.
A company is running a production Amazon RDS for Oracle DB instance. The database specialist is setting up monitoring to detect and troubleshoot performance issues. Which TWO metrics should be used to identify whether the database is experiencing I/O bottlenecks?
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
ReadLatency
The correct answers are ReadLatency (C) and WriteLatency (D). These metrics directly measure the time taken for I/O operations; high values indicate I/O bottlenecks. Option A (DatabaseConnections) measures the number of connections, not I/O performance. Option B (CPUUtilization) measures CPU usage, which can be high for many reasons, not necessarily I/O. Option E (FreeStorageSpace) indicates storage capacity, not performance. Therefore, only C and D are correct.
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.
- ✗
DatabaseConnections
Why it's wrong here
DatabaseConnections measures the number of connections to the database, not I/O performance. It is not a direct indicator of I/O bottlenecks.
- ✗
CPUUtilization
Why it's wrong here
CPUUtilization measures CPU usage. While high CPU can be related to I/O waits, it is not a direct I/O metric and can be caused by other factors.
- ✓
ReadLatency
Why this is correct
ReadLatency measures the time taken for read I/O operations. High read latency is a direct indicator of I/O bottlenecks.
Related concept
Standard ACLs match source addresses.
- ✓
WriteLatency
Why this is correct
WriteLatency measures the time taken for write I/O operations. High write latency is a direct indicator of I/O bottlenecks.
Related concept
Standard ACLs match source addresses.
- ✗
FreeStorageSpace
Why it's wrong here
FreeStorageSpace indicates the amount of available storage, not the performance of I/O operations. It does not help identify I/O bottlenecks.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 DBS-C01 ACL questions on filtering logic and placement.
- →
Monitoring and Troubleshooting — study guide chapter
Learn the concepts, then practise the questions
- →
Monitoring and Troubleshooting practice questions
Targeted practice on this topic area only
- →
All DBS-C01 questions
1,730 questions across all exam domains
- →
AWS Certified Database Specialty DBS-C01 study guide
Full concept coverage aligned to exam objectives
- →
DBS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DBS-C01 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Workload-Specific Database Design practice questions
Practise DBS-C01 questions linked to Workload-Specific Database Design.
Deployment and Migration practice questions
Practise DBS-C01 questions linked to Deployment and Migration.
Management and Operations practice questions
Practise DBS-C01 questions linked to Management and Operations.
Monitoring and Troubleshooting practice questions
Practise DBS-C01 questions linked to Monitoring and Troubleshooting.
Database Security practice questions
Practise DBS-C01 questions linked to Database Security.
DBS-C01 fundamentals practice questions
Practise DBS-C01 questions linked to DBS-C01 fundamentals.
DBS-C01 scenario practice questions
Practise DBS-C01 questions linked to DBS-C01 scenario.
DBS-C01 troubleshooting practice questions
Practise DBS-C01 questions linked to DBS-C01 troubleshooting.
Practice this exam
Start a free DBS-C01 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DBS-C01 question test?
Monitoring and Troubleshooting — This question tests Monitoring and Troubleshooting — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: ReadLatency — The correct answers are ReadLatency (C) and WriteLatency (D). These metrics directly measure the time taken for I/O operations; high values indicate I/O bottlenecks. Option A (DatabaseConnections) measures the number of connections, not I/O performance. Option B (CPUUtilization) measures CPU usage, which can be high for many reasons, not necessarily I/O. Option E (FreeStorageSpace) indicates storage capacity, not performance. Therefore, only C and D are correct.
What should I do if I get this DBS-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 DBS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More DBS-C01 practice questions
- A company is deploying a new application on Amazon RDS for PostgreSQL. The security policy requires that all data be enc…
- Match each AWS service to its primary purpose.
- A financial services company runs a production Amazon Aurora MySQL database cluster (1 writer, 2 readers) in us-east-1.…
- A company is designing a database for a global e-commerce platform that requires low-latency reads and writes from multi…
- A security auditor reviews the output of a DynamoDB table description command as shown in the exhibit. Which statement a…
- A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database contains sensitive data tha…
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.