- A
Use Provisioned IOPS (io1 or io2) storage.
Provisioned IOPS provides consistent low-latency writes.
- B
Reduce the backup retention period to 1 day.
Why wrong: Reducing backup retention does not improve write performance.
- C
Increase the DB instance class to a larger size.
More CPU and memory can handle higher write throughput.
- D
Create a Read Replica to offload writes.
Why wrong: Read Replicas handle reads, not writes.
- E
Enable Multi-AZ for high availability.
Why wrong: Multi-AZ provides failover, not write performance improvement.
Question 1,449 of 1,786
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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 data engineer is optimizing an Amazon RDS for MySQL database that experiences high write throughput. The engineer wants to improve write performance and reduce latency. Which TWO database-level configuration changes can help achieve this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Provisioned IOPS (io1 or io2) storage.
Provisioned IOPS (io1 or io2) storage delivers consistent and predictable I/O performance by guaranteeing a specified number of I/O operations per second, which directly reduces latency and improves write throughput for high-write workloads. This is the most effective storage-level change for write-intensive RDS for MySQL databases.
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.
- ✓
Use Provisioned IOPS (io1 or io2) storage.
Why this is correct
Provisioned IOPS provides consistent low-latency writes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Reduce the backup retention period to 1 day.
Why it's wrong here
Reducing backup retention does not improve write performance.
- ✓
Increase the DB instance class to a larger size.
Why this is correct
More CPU and memory can handle higher write throughput.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a Read Replica to offload writes.
Why it's wrong here
Read Replicas handle reads, not writes.
- ✗
Enable Multi-AZ for high availability.
Why it's wrong here
Multi-AZ provides failover, not write performance improvement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Multi-AZ with performance improvement, but Multi-AZ is designed for durability and failover, not for speeding up writes.
Detailed technical explanation
How to think about this question
Provisioned IOPS storage uses a dedicated SSD-backed volume that maintains the specified IOPS level regardless of workload, unlike General Purpose (gp2/gp3) storage which can suffer from burst balance exhaustion. For high write throughput, io2 Block Express volumes offer up to 256,000 IOPS and sub-millisecond latency, making them ideal for transactional workloads. Increasing the DB instance class (Option C) adds more CPU and memory, which can improve write performance by reducing contention and allowing more concurrent write operations, especially when the database is CPU-bound.
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.
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
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Provisioned IOPS (io1 or io2) storage. — Provisioned IOPS (io1 or io2) storage delivers consistent and predictable I/O performance by guaranteeing a specified number of I/O operations per second, which directly reduces latency and improves write throughput for high-write workloads. This is the most effective storage-level change for write-intensive RDS for MySQL databases.
What should I do if I get this DEA-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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