AWS Certified Cloud Practitioner (CLF-C02) — Question 1

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 designed specifically for key-value and document data models and is known for its ability to handle high throughput with low latency. In contrast, Amazon Aurora is a relational database, Amazon DocumentDB is suited for document data, and Amazon Neptune is a graph database, none of which focus on the same key-value pair capabilities with sub-millisecond performance.