This DBS-C01 practice question tests your understanding of deployment and migration. 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. A key principle to apply: provisioned IOPS (io1). 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.
Network Topology
Refer to the exhibit. A company's production RDS MySQL instance 'mydb' is configured as shown. The application experiences write latency spikes during peak hours. Which action would most effectively reduce write latency?
Network Topology
A
Change the storage type to Provisioned IOPS (io1) and allocate sufficient IOPS.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the storage type to Provisioned IOPS (io1) and allocate sufficient IOPS.
The RDS MySQL instance uses gp2 storage with 500 GB, providing a baseline of 1500 IOPS (3 IOPS per GB). Write latency spikes during peak hours indicate that the workload is exceeding these IOPS, causing throttling. Changing to Provisioned IOPS (io1) allows allocating a higher, consistent IOPS level that matches the write workload, directly reducing write latency. Option D (Multi-AZ) adds synchronous replication overhead, increasing write latency. Option B (Read Replica) offloads reads, not writes. Option C (increasing storage) raises baseline IOPS but is less efficient and more costly than provisioning exact IOPS with io1.
Key principle: Provisioned IOPS (io1)
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Change the storage type to Provisioned IOPS (io1) and allocate sufficient IOPS.
Read replicas are for read scaling, not write latency.
✗
Increase the allocated storage to 1 TB to improve baseline IOPS.
Why it's wrong here
Increasing storage increases baseline IOPS but may not solve spikes; Provisioned IOPS is better.
✗
Enable Multi-AZ deployment to provide a standby instance.
Why it's wrong here
Multi-AZ can increase write latency due to synchronous replication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Multi-AZ improves availability but adds synchronous replication to the standby, which increases write latency. Candidates may incorrectly think Multi-AZ reduces write latency.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Provisioned IOPS (io1)
gp2 baseline IOPS
Multi-AZ replication
TExam Day Tips
→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
Provisioned IOPS (io1)
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.
Review provisioned IOPS (io1), then practise related DBS-C01 questions on the same topic to reinforce the concept.
Deployment and Migration — This question tests Deployment and Migration — Provisioned IOPS (io1).
What is the correct answer to this question?
The correct answer is: Change the storage type to Provisioned IOPS (io1) and allocate sufficient IOPS. — The RDS MySQL instance uses gp2 storage with 500 GB, providing a baseline of 1500 IOPS (3 IOPS per GB). Write latency spikes during peak hours indicate that the workload is exceeding these IOPS, causing throttling. Changing to Provisioned IOPS (io1) allows allocating a higher, consistent IOPS level that matches the write workload, directly reducing write latency. Option D (Multi-AZ) adds synchronous replication overhead, increasing write latency. Option B (Read Replica) offloads reads, not writes. Option C (increasing storage) raises baseline IOPS but is less efficient and more costly than provisioning exact IOPS with io1.
What should I do if I get this DBS-C01 question wrong?
Review provisioned IOPS (io1), then practise related DBS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Provisioned IOPS (io1)
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Question Discussion
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