AWS Certified Cloud Practitioner — Question 306

Which AWS service is a key-value database that provides sub-millisecond latency on a large scale?

Answer options

• A. Amazon DynamoDB
• B. Amazon Aurora
• C. Amazon DocumentDB (with MongoDB compatibility)
• D. Amazon Neptune

Correct answer: A

Explanation

Amazon DynamoDB is a fully managed NoSQL database service that supports key-value data structures and is designed to provide single-digit millisecond latency at any scale. In contrast, Amazon Aurora is a relational database, Amazon DocumentDB is a document database, and Amazon Neptune is a graph database.