SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 designing a new application on AWS that requires a highly available and durable NoSQL database. The database must be able to scale horizontally for both reads and writes. Which TWO AWS services meet these requirements? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon DynamoDB
Options A and C are correct. Amazon DynamoDB is a fully managed NoSQL database that scales horizontally and provides high availability and durability. Amazon DocumentDB is a MongoDB-compatible document database that also scales horizontally. Option B is wrong because RDS is relational. Option D is wrong because Neptune is a graph database. Option E is wrong because ElastiCache is a cache.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Amazon Neptune
Why it's wrong here
Neptune is a graph database, not a general-purpose NoSQL database.
✓
Amazon DynamoDB
Why this is correct
DynamoDB is a fully managed NoSQL database with horizontal scaling and high durability.
Related concept
Static NAT maps one inside address to one outside address.
✗
Amazon RDS for MySQL with Multi-AZ
Why it's wrong here
RDS is a relational database, not NoSQL.
✓
Amazon DocumentDB (with MongoDB compatibility)
Why this is correct
DocumentDB is a NoSQL document database that scales horizontally.
Related concept
Static NAT maps one inside address to one outside address.
✗
Amazon ElastiCache for Memcached
Why it's wrong here
ElastiCache is a caching service, not a durable NoSQL database.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
Design for New Solutions — This question tests Design for New Solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Amazon DynamoDB — Options A and C are correct. Amazon DynamoDB is a fully managed NoSQL database that scales horizontally and provides high availability and durability. Amazon DocumentDB is a MongoDB-compatible document database that also scales horizontally. Option B is wrong because RDS is relational. Option D is wrong because Neptune is a graph database. Option E is wrong because ElastiCache is a cache.
What should I do if I get this SAP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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