Which service is a fast, reliable, fully managed graph database service that makes it easy to build and run applications with highly connected datasets?

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

Answer: (B)

Graph databases are built to handle highly connected data efficiently, enabling fast traversals across nodes and edges to uncover relationships in social networks, recommendations, fraud detection, and network topology.

Amazon Neptune is the AWS service designed for this purpose. It is a fully managed graph database that excels at storing and querying interconnected data with low latency. Neptune supports two graph models: RDF with SPARQL and Property Graphs with Gremlin, giving flexibility in how you model and query relationships. It handles the operational burden for you—provisioning, patching, backups, automatic failover across multiple Availability Zones, encryption, and point-in-time recovery—so you can focus on building applications. Its architecture is optimized for graph workloads, delivering fast traversals and scale, while maintaining strong consistency and transactional integrity.

Other options are not specialized graph databases: DocumentDB is for document data modeled like JSON (MongoDB compatibility), RDS is a relational database service, and DynamoDB is a fast NoSQL key-value/document store without native graph traversal capabilities. Neptune is the right fit for applications with highly connected datasets.