The answer is to enable RDS Performance Insights and analyze the top SQL queries. This is correct because Performance Insights directly captures database load and breaks it down by SQL query, wait events, and hosts, allowing you to identify the specific queries consuming the most CPU on your RDS for MySQL instance. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish between monitoring tools: CloudWatch Logs lacks query-level capture, Enhanced Monitoring provides OS metrics only, and X-Ray is for application tracing, not database queries. A common trap is confusing Enhanced Monitoring’s OS-level CPU with query-level CPU—remember that Performance Insights is the only service that surfaces top SQL by load. For a memory tip, think “PI for Queries, EM for OS” to recall that Performance Insights pinpoints problematic SQL, while Enhanced Monitoring shows instance health.
DOP-C02 Monitoring and Logging Practice Question
This DOP-C02 practice question tests your understanding of monitoring and logging. 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.
A DevOps engineer notices that an Amazon RDS for MySQL instance's CPU is consistently high during business hours. The engineer wants to identify the specific queries causing the high CPU. Which combination of services should be used to capture and analyze the queries? (Choose the best answer.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable RDS Performance Insights and analyze the top SQL queries
Option C is correct because RDS Performance Insights provides a dashboard to identify top SQL queries consuming CPU. Option A is wrong because CloudWatch Logs alone doesn't capture queries. Option B is wrong because RDS Enhanced Monitoring provides OS-level metrics, not query-level. Option D is wrong because AWS X-Ray traces requests, not database queries.
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.
✓
Enable RDS Performance Insights and analyze the top SQL queries
Why this is correct
Performance Insights identifies the top queries by CPU usage.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Enable RDS Enhanced Monitoring and view metrics in CloudWatch
Why it's wrong here
Enhanced Monitoring provides OS metrics, not specific queries.
✗
Enable AWS X-Ray tracing on the application and database
Why it's wrong here
X-Ray traces requests but does not capture database queries.
✗
Enable RDS audit logs and stream them to Amazon CloudWatch Logs
Why it's wrong here
Audit logs show connections and queries but are not optimized for performance analysis.
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.
Trap categories for this question
Command / output trap
Audit logs show connections and queries but are not optimized for performance analysis.
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
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 DOP-C02 NAT questions on configuration and troubleshooting.
Monitoring and Logging — This question tests Monitoring and Logging — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable RDS Performance Insights and analyze the top SQL queries — Option C is correct because RDS Performance Insights provides a dashboard to identify top SQL queries consuming CPU. Option A is wrong because CloudWatch Logs alone doesn't capture queries. Option B is wrong because RDS Enhanced Monitoring provides OS-level metrics, not query-level. Option D is wrong because AWS X-Ray traces requests, not database queries.
What should I do if I get this DOP-C02 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 DOP-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A DevOps engineer is troubleshooting an issue where an Amazon RDS for MySQL instance is experiencing high latency. The engineer wants to identify which queries are causing the problem. Which AWS service should be used?
easy
✓ A.Amazon RDS Performance Insights
B.AWS CloudTrail
C.Amazon CloudWatch Metrics
D.VPC Flow Logs
Why A: Option B is correct because RDS Performance Insights provides a database performance tuning and monitoring feature that allows you to assess the load on your database and determine when and where to take action. Option A is wrong because CloudWatch metrics show aggregate performance, not per-query. Option C is wrong because CloudTrail records API calls. Option D is wrong because VPC Flow Logs capture network traffic.
Variation 2. A DevOps engineer is troubleshooting a performance issue with an Amazon RDS for MySQL database. The engineer suspects that slow queries are causing high CPU utilization. Which TWO actions can the engineer take to identify the slow queries?
easy
A.Create an RDS event subscription for 'low storage' events.
B.Monitor the 'CPUUtilization' metric in CloudWatch.
✓ C.Enable the slow query log and publish it to CloudWatch Logs.
✓ D.Enable Performance Insights to visualize database load and identify top SQL statements.
E.Enable Enhanced Monitoring to view process list and SQL queries.
Why C: Options A and C are correct. Option A: Enabling the slow query log and sending it to CloudWatch Logs allows analysis. Option C: Enabling Performance Insights provides a dashboard to view database load and identify slow queries. Option B is wrong because Enhanced Monitoring provides OS-level metrics, not query details. Option D is wrong because the RDS event subscription notifies about database events, not slow queries. Option E is wrong because CloudWatch database metrics include CPU, but not query text.
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This DOP-C02 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 DOP-C02 exam.
Question Discussion
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