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What is Amazon DynamoDB and what are its key characteristics?
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Amazon DynamoDB is a fully managed NoSQL database service provided by AWS. Key characteristics include:
- Serverless: No infrastructure management required
- High Performance: Single-digit millisecond latency at any scale
- Highly Available: 99.99% availability SLA with multi-AZ replication
- Flexible Schema: NoSQL document and key-value data models
- Auto Scaling: Automatically scales up/down based on traffic
- ACID Transactions: Support for transactions across multiple items
- Global Tables: Multi-region, multi-master replication
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