Question 1hardmulti select
Full question →hardmulti selectObjective-mapped
A product catalog system uses a relational database for orders and a simple key-value profile store for shopping carts. Traffic is unpredictable, and the company wants to avoid paying for large idle database instances. Which two choices are best? Select two.
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Use Aurora Serverless v2 for the relational order system.
Correct. Aurora Serverless v2 is designed for variable relational workloads because capacity can scale without constantly paying for a large fixed instance. It preserves SQL features while reducing idle overprovisioning.
B
Best answer
Use DynamoDB on-demand capacity for the shopping-cart profile store.
Correct. On-demand capacity fits unpredictable key-value traffic and avoids the need to guess throughput in advance. It is a strong cost choice when access patterns are variable and the schema is simple.
C
Distractor review
Keep both workloads on large provisioned RDS instances and add read replicas for the cart store.
Incorrect. This keeps both systems on fixed-capacity relational infrastructure even where a simpler managed database would be cheaper. The cart workload does not justify expensive relational replicas.
D
Distractor review
Use DynamoDB provisioned capacity with a fixed minimum despite the unpredictable traffic.
Incorrect. Fixed provisioned capacity can be cheaper only when traffic is stable and predictable. Here, the company explicitly wants to avoid paying for idle capacity during variable demand.
E
Distractor review
Replace the relational order system with a wide-column table to reduce SQL licensing.
Incorrect. Replacing the relational system would force a redesign and remove the SQL and transaction model that order processing usually needs. Cost optimization should not break the application requirements.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Use Aurora Serverless v2 for the relational order system. — The best design uses the right database model for each workload and avoids paying for fixed idle capacity. Aurora Serverless v2 is a good fit for the relational order system because it can scale with demand while preserving SQL semantics. DynamoDB on-demand is a strong fit for the cart profile store because the traffic is unpredictable and the access pattern is simple key-value lookup. Together, they reduce overprovisioning without forcing a rewrite. Why others are wrong: Keeping both workloads on oversized RDS instances wastes money and does not reflect their different access patterns. Fixed DynamoDB provisioned capacity is the wrong choice when traffic is unpredictable. Replacing the relational system with a wide-column table would trade away the relational model for no clear cost win and would likely increase application risk.
What should I do if I get this SAA-C03 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
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