The correct answer is to enable a Multi-AZ DB cluster deployment with two readable standby instances and route read traffic to the standbys. This configuration reduces read latency on RDS MySQL without scaling because it offloads small, random reads from the primary instance to the two readable standbys, distributing the read workload and freeing the primary to focus on writes. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding of the Multi-AZ DB cluster’s distinct advantage over the standard Multi-AZ deployment: the standbys are fully readable, not just passive replicas. A common trap is assuming you must scale up the instance size or storage to fix read latency, but those options increase costs or fail to address the root cause of read contention. Remember the memory tip: “Read offload, not scale up” — when you see high read latency on a Multi-AZ instance, think of using the cluster’s readable standbys before considering a larger instance.
DBS-C01 Monitoring and Troubleshooting Practice Question
This DBS-C01 practice question tests your understanding of monitoring and troubleshooting. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 experiencing high read latency on their Amazon RDS for MySQL Multi-AZ DB instance. The application performs many small, random reads. Which configuration change would most likely reduce the read latency without incurring additional compute costs?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Multi-AZ DB cluster deployment with two readable standby instances and route read traffic to the standby.
Option B is correct because Amazon RDS provides the Multi-AZ DB cluster deployment option which includes two readable standby instances, allowing read traffic to be offloaded to the standby to reduce load on the primary. Option A is incorrect because increasing the instance size would increase compute costs. Option C is incorrect because enabling Performance Insights does not reduce read latency. Option D is incorrect because increasing the allocated storage does not directly improve read latency for random reads.
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.
✗
Increase the allocated storage size to improve I/O throughput.
Why it's wrong here
Allocated storage size does not directly affect read latency for random reads.
✗
Enable Performance Insights to monitor and optimize queries.
Why it's wrong here
Performance Insights helps identify performance bottlenecks but does not directly reduce read latency.
✓
Enable Multi-AZ DB cluster deployment with two readable standby instances and route read traffic to the standby.
Why this is correct
This offloads read traffic to the standby, reducing load on the primary and improving read latency.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the instance size from db.r5.large to db.r5.xlarge.
Why it's wrong here
This would increase compute costs, not reducing costs.
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.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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: Enable Multi-AZ DB cluster deployment with two readable standby instances and route read traffic to the standby. — Option B is correct because Amazon RDS provides the Multi-AZ DB cluster deployment option which includes two readable standby instances, allowing read traffic to be offloaded to the standby to reduce load on the primary. Option A is incorrect because increasing the instance size would increase compute costs. Option C is incorrect because enabling Performance Insights does not reduce read latency. Option D is incorrect because increasing the allocated storage does not directly improve read latency for random reads.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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 →
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 company is running an Amazon RDS for MySQL Multi-AZ DB instance. They notice that the application is experiencing increased latency during peak hours. The DB instance's CPU utilization is consistently above 80%, and the Read Latency metric is high. Which action would most effectively reduce the latency without requiring application changes?
medium
✓ A.Create a read replica and direct read queries to it.
B.Disable Multi-AZ to free up resources.
C.Increase the DB instance class to a larger size.
D.Enable Multi-AZ on the DB instance.
Why A: Option D is correct because Multi-AZ deployments with read replicas offload read traffic and reduce latency. Option A is wrong because increasing instance size may help but does not specifically address read latency. Option B is wrong because enabling Multi-AZ alone does not reduce read latency. Option C is wrong because disabling Multi-AZ would remove the standby, reducing availability.
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.
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.