AWS (Amazon Web Services) Certification Practice Exam

What is a primary use case for Amazon DynamoDB?

1. Real-time processing of streaming data

2. Provides reliable performance

3. Hosting large-scale applications

4. Batch processing of large datasets

The correct answer is: Provides reliable performance

Amazon DynamoDB is a fully managed NoSQL database service designed for high availability and reliability. One of its primary use cases is indeed to provide reliable performance for applications that require quick and consistent responses to user requests. It is built to handle large volumes of data at scale and can efficiently manage significant read and write operations without performance degradation. DynamoDB utilizes a distributed architecture that allows it to spread data across multiple servers, ensuring that even under heavy load, users experience minimal latency and reliable throughput. This characteristic makes it well-suited for applications with unpredictable workloads and rapid response time requirements, such as gaming, IoT applications, and real-time analytics. While other options do reflect capabilities or scenarios where DynamoDB could be utilized, they either don’t capture its primary function fully or describe broader categories that include many other AWS services or databases. For instance, while hosting large-scale applications might imply the use of DynamoDB, it doesn't directly identify its strengths like "reliable performance" does, which is essential for maintaining seamless user experiences in dynamic environments.