Quick Answer
The correct answer is Amazon DynamoDB and Amazon Keyspaces (for Apache Cassandra). DynamoDB is a fully managed, multi-AZ NoSQL database that provides built-in high availability and durability through automatic replication across three Availability Zones, with Global Tables enabling cross-region disaster recovery. Keyspaces offers a managed, serverless Cassandra-compatible service that inherits Cassandra’s proven distributed architecture for high availability across multiple AWS Availability Zones. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this question tests your ability to distinguish purpose-built NoSQL services from relational or graph databases—a common trap is selecting DocumentDB (MongoDB-compatible) because it is also NoSQL, but it lacks the same level of fully managed multi-AZ replication as DynamoDB and Keyspaces. Memory tip: think “D-K” for “Durable Keys” — DynamoDB and Keyspaces are the only two fully managed, highly available NoSQL options that natively span multiple AZs without additional configuration.
This SAP-C02 practice question tests your understanding of design for new solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 that requires a highly available and durable NoSQL database. Which TWO services should be considered? (Choose TWO.)
Amazon DocumentDB
Why wrong: DocumentDB is MongoDB-compatible, but not the best fit for high availability beyond single region.
Amazon DynamoDB
DynamoDB provides high availability and durability.
Amazon Neptune
Why wrong: Neptune is graph database, not general NoSQL.
Amazon RDS
Why wrong: RDS is relational, not NoSQL.
Amazon Keyspaces (for Apache Cassandra)
Keyspaces is managed Cassandra, a NoSQL database.
Answer choices
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 D are correct. DynamoDB is fully managed NoSQL with multi-AZ replication and Global Tables. Keyspaces is managed Cassandra. Option B is wrong because Neptune is graph. Option C is wrong because RDS is relational. Option E is wrong because DocumentDB is MongoDB-compatible, but not as fully managed NoSQL as the others.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon DocumentDB
Why it's wrong here
DocumentDB is MongoDB-compatible, but not the best fit for high availability beyond single region.
Amazon DynamoDB
Why this is correct
DynamoDB provides high availability and durability.
Related concept
Static NAT maps one inside address to one outside address.
Amazon Neptune
Why it's wrong here
Neptune is graph database, not general NoSQL.
Amazon RDS
Why it's wrong here
RDS is relational, not NoSQL.
Amazon Keyspaces (for Apache Cassandra)
Why this is correct
Keyspaces is managed Cassandra, a NoSQL database.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
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
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.
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
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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.
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FAQ
Design for New Solutions — This question tests Design for New Solutions — Static NAT maps one inside address to one outside address..
The correct answer is: Amazon DynamoDB — Options A and D are correct. DynamoDB is fully managed NoSQL with multi-AZ replication and Global Tables. Keyspaces is managed Cassandra. Option B is wrong because Neptune is graph. Option C is wrong because RDS is relational. Option E is wrong because DocumentDB is MongoDB-compatible, but not as fully managed NoSQL as the others.
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.
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. 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.)
hardWhy B: 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.
Last reviewed: Jun 20, 2026
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAP-C02 exam.
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