DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. 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.
An Amazon RDS for PostgreSQL instance is experiencing high CPU utilization and slow query performance. The data engineer suspects that a specific query is causing the problem. The engineer wants to identify the query and analyze its execution plan. Which steps should the engineer take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the performance_schema in the PostgreSQL parameter group and query the performance_schema.events_statements_summary_by_digest table.
Option D is correct because enabling performance_schema and querying performance_schema.events_statements_summary_by_digest helps identify high-load queries. Option A is incorrect because Enhanced Monitoring provides OS-level metrics, not query details. Option B is incorrect because CloudWatch Logs captures database logs, but not real-time query performance. Option C is incorrect because RDS Performance Insights provides query performance data, but the specific query and plan are best obtained via performance_schema.
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.
✗
Enable CloudWatch Logs for the RDS instance and search for slow query logs.
Why it's wrong here
Slow query logs can be enabled, but they are not real-time and require log analysis.
✓
Enable the performance_schema in the PostgreSQL parameter group and query the performance_schema.events_statements_summary_by_digest table.
Why this is correct
This provides detailed query statistics and can help identify problematic queries and their execution plans.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Enhanced Monitoring and analyze the CPU metrics.
Why it's wrong here
Enhanced Monitoring shows OS metrics but not individual query details or execution plans.
✗
Use RDS Performance Insights to identify the top queries.
Why it's wrong here
Performance Insights helps identify top queries but does not directly provide execution plans.
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
Enhanced Monitoring shows OS metrics but not individual query details or execution plans.
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 DEA-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.
Data Operations and Support — This question tests Data Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the performance_schema in the PostgreSQL parameter group and query the performance_schema.events_statements_summary_by_digest table. — Option D is correct because enabling performance_schema and querying performance_schema.events_statements_summary_by_digest helps identify high-load queries. Option A is incorrect because Enhanced Monitoring provides OS-level metrics, not query details. Option B is incorrect because CloudWatch Logs captures database logs, but not real-time query performance. Option C is incorrect because RDS Performance Insights provides query performance data, but the specific query and plan are best obtained via performance_schema.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-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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