Answer: Amazon S3

## Explanation In Amazon Bedrock Knowledge Base, source documents (such as PDFs, text files, JSON files, etc.) are typically stored in **Amazon S3** buckets. ### Key Points: 1. **Amazon S3 (Simple Storage Service)** is AWS's object storage service designed for storing and retrieving any amount of data from anywhere. 2. When creating a Knowledge Base in Amazon Bedrock, you specify an S3 bucket location where your source documents are stored. 3. Bedrock then ingests these documents from S3, processes them, and creates vector embeddings that are stored in a vector database (like Amazon OpenSearch Service, Pinecone, etc.). 4. The other options are not typically used for storing source documents in Bedrock Knowledge Base: - **DynamoDB**: A NoSQL database service, not typically used for storing raw source documents - **Kinesis Data Streams**: A real-time data streaming service - **RDS MySQL**: A relational database service, not optimized for storing large documents like PDFs ### Why S3 is the correct choice: - S3 provides scalable, durable, and secure storage for unstructured data - It's cost-effective for storing large volumes of documents - S3 integrates seamlessly with other AWS services including Bedrock - Documents in S3 can be easily managed, versioned, and secured with IAM policies

Author: Ritesh Yadav