- A
Use Amazon RDS Proxy to manage database connections.
Reduces connection overhead.
- B
Enable Multi-AZ to distribute the load.
Why wrong: Multi-AZ does not distribute load.
- C
Create read replicas to offload read traffic.
Why wrong: Does not address CPU due to connections.
- D
Increase the DB instance size to a larger instance type.
Why wrong: May help but is not the most cost-effective.
- E
Implement caching with Amazon ElastiCache for frequently accessed data.
Reduces database queries.
Question 199 of 1,730
DBS-C01 Amazon RDS Proxy Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: amazon RDS Proxy. 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 runs a web application that uses Amazon RDS for MySQL. The database frequently experiences high CPU utilization due to many concurrent connections. The application uses connection pooling at the application layer. Which TWO approaches can reduce CPU load on the database?
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 Amazon RDS Proxy to manage database connections.
Two approaches can reduce CPU load on the database. First, Amazon RDS Proxy manages database connections by pooling and reusing them, reducing the overhead of connection establishment and context switching, thus lowering CPU utilization. Second, Amazon ElastiCache caches frequently accessed data, offloading read queries from the database and reducing CPU usage from repeated query executions.
Key principle: Amazon RDS Proxy
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 Amazon RDS Proxy to manage database connections.
Why this is correct
Reduces connection overhead.
Related concept
Amazon RDS Proxy
- ✗
Enable Multi-AZ to distribute the load.
Why it's wrong here
Multi-AZ does not distribute load.
- ✗
Create read replicas to offload read traffic.
Why it's wrong here
Does not address CPU due to connections.
- ✗
Increase the DB instance size to a larger instance type.
Why it's wrong here
May help but is not the most cost-effective.
- ✓
Implement caching with Amazon ElastiCache for frequently accessed data.
Why this is correct
Reduces database queries.
Related concept
Amazon RDS Proxy
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Multi-AZ with load balancing, not realizing the standby instance is passive and cannot serve traffic, or they assume scaling up is the only solution when connection pooling is a more efficient architectural fix.
Detailed technical explanation
How to think about this question
RDS Proxy uses a connection multiplexing architecture where it maintains a small pool of persistent connections to the database and maps many client-side connections to them. This reduces the overhead of MySQL's thread-per-connection model, where each connection consumes memory and CPU for context switching. In real-world scenarios, applications with thousands of short-lived connections can see CPU reductions of 30-50% by using RDS Proxy alone.
KKey Concepts to Remember
- Amazon RDS Proxy
- Amazon ElastiCache
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
Amazon RDS Proxy
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
Quick reference
OSI Model Reference
| Layer | Name | PDU | Key Protocols / Devices |
|---|---|---|---|
| 7 | Application | Data | HTTP, HTTPS, DNS, SMTP, FTP, SSH |
| 6 | Presentation | Data | TLS / SSL, JPEG, ASCII encoding |
| 5 | Session | Data | NetBIOS, RPC, SIP |
| 4 | Transport | Segment / Datagram | TCP, UDP |
| 3 | Network | Packet | IP, ICMP, OSPF — Routers |
| 2 | Data Link | Frame | Ethernet, Wi-Fi, PPP — Switches, Bridges |
| 1 | Physical | Bits | Cables, NICs, Hubs, Repeaters |
What to study next
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Amazon RDS Proxy.
What is the correct answer to this question?
The correct answer is: Use Amazon RDS Proxy to manage database connections. — Two approaches can reduce CPU load on the database. First, Amazon RDS Proxy manages database connections by pooling and reusing them, reducing the overhead of connection establishment and context switching, thus lowering CPU utilization. Second, Amazon ElastiCache caches frequently accessed data, offloading read queries from the database and reducing CPU usage from repeated query executions.
What should I do if I get this DBS-C01 question wrong?
Review amazon RDS Proxy, then practise related DBS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Amazon RDS Proxy
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Last reviewed: Jul 4, 2026
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