The answer is Amazon Aurora Performance Insights with the 'Wait for lock' dimension. This is correct because Performance Insights captures database load and breaks it down by wait events, and the 'Wait for lock' dimension specifically surfaces which session is holding a lock that others are waiting on, directly pinpointing the blocking transaction causing the 'Lock wait timeout exceeded' errors during a write surge. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your ability to differentiate between monitoring tools: a common trap is confusing Enhanced Monitoring (OS-level metrics) or CloudWatch Logs Insights (log analysis) with Performance Insights’ session-level lock analysis. Remember that Performance Insights is purpose-built for database performance troubleshooting, not security or OS metrics. A helpful memory tip: think of "PI for Locks" — Performance Insights is your lock detective, showing you exactly who is holding the key.
DBS-C01 Monitoring and Troubleshooting Practice Question
This DBS-C01 practice question tests your understanding of monitoring and troubleshooting. 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 e-commerce application uses Amazon Aurora MySQL. During a flash sale, the database experiences a surge in write operations, and the application reports 'Lock wait timeout exceeded' errors. The DBA suspects a long-running transaction is blocking others. Which AWS tool or feature should the DBA use to identify the blocking transaction?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon Aurora Performance Insights with the 'Wait for lock' dimension
Option D is correct because Aurora's Performance Insights with the 'Wait for lock' dimension can identify blocking sessions. Option A is wrong because Amazon Inspector is a security assessment tool. Option B is wrong because CloudWatch Logs Insights can analyze logs but does not directly identify blocking transactions. Option C is wrong because Enhanced Monitoring provides OS-level metrics, not database lock information.
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.
✓
Amazon Aurora Performance Insights with the 'Wait for lock' dimension
Why this is correct
Performance Insights can display blocking sessions and wait events.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon Inspector
Why it's wrong here
Inspector is for security vulnerabilities, not database performance.
✗
CloudWatch Logs Insights
Why it's wrong here
Logs Insights can query logs but cannot directly show blocking transactions.
✗
Amazon RDS Enhanced Monitoring
Why it's wrong here
Enhanced Monitoring shows OS metrics, not database locks.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Logs Insights can query logs but cannot directly show blocking transactions.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Monitoring and Troubleshooting — This question tests Monitoring and Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon Aurora Performance Insights with the 'Wait for lock' dimension — Option D is correct because Aurora's Performance Insights with the 'Wait for lock' dimension can identify blocking sessions. Option A is wrong because Amazon Inspector is a security assessment tool. Option B is wrong because CloudWatch Logs Insights can analyze logs but does not directly identify blocking transactions. Option C is wrong because Enhanced Monitoring provides OS-level metrics, not database lock information.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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