AWS (Amazon Web Services) Certification Practice Exam

What overall advantage does automatic scaling of throughput capacity provide in Amazon DynamoDB?

1. Minimizes operational costs during idle time

2. Enhances application performance without configuration

3. Ensures 100% uptime for all transactions

4. Provides unlimited data storage capabilities

The correct answer is: Enhances application performance without configuration

Automatic scaling of throughput capacity in Amazon DynamoDB enhances application performance without requiring manual configuration. This feature allows DynamoDB to automatically adjust the read and write capacity of the database based on the application's traffic patterns. When traffic increases, the scaling mechanism dynamically increases the throughput capacity to accommodate the additional load, ensuring that performance remains consistent and responsive. Conversely, when demand decreases, it reduces the capacity to prevent over-provisioning resources, which could lead to unnecessary costs. This process occurs without the need for developers or operators to intervene or manually adjust the settings, allowing them to focus on building and deploying their applications rather than managing resource allocation. This approach is fundamentally designed to maintain performance and user experience, particularly for applications with variable usage patterns. It dynamically adapts to changes, thus achieving better performance outcomes in scenarios of fluctuating workloads. Other choices focus on aspects like cost control, uptime, or storage capabilities, but they do not directly address the primary benefit of performance enhancement through automated adjustments.