Which AWS service provides a fully-managed NoSQL database?

Amazon DynamoDB is the AWS service that provides a fully-managed NoSQL database solution. It is designed for high availability and scalability, allowing developers to store and retrieve any amount of data, offering single-digit millisecond performance at any scale. One of the key features of DynamoDB is its ability to handle large amounts of data and traffic without the need for manual intervention or administration, which is a hallmark of fully-managed services.

DynamoDB automatically scales up and down to adjust for capacity and maintain performance, while also providing automatic backups, in-memory caching, and built-in security features. This makes it an ideal choice for applications that require consistent, low-latency data access and can accommodate various data types and structures—characteristics that align perfectly with NoSQL databases.

In contrast, the other options mentioned serve different database needs or are relational database management systems (RDBMS) rather than NoSQL solutions. Amazon RDS supports multiple database engines designed for relational databases, Amazon Aurora is a relational database that offers additional performance and scalability features focused on SQL databases, and Amazon Redshift is geared towards data warehousing and analytics, not general-purpose databases. This clearly identifies DynamoDB as the correct choice for a fully-managed NoSQL database service.