AWS Solutions Architect Associate Practice Test

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What is an optimal way to ensure the durability and availability of data collected from millions of mobile device users?

  1. Store data temporarily in an S3 bucket

  2. Use relational databases for immediate processing

  3. Utilize high-availability configurations in DynamoDB

  4. Directly store votes in Amazon EC2 instances

The correct answer is: Utilize high-availability configurations in DynamoDB

Utilizing high-availability configurations in DynamoDB is a highly effective strategy for ensuring both the durability and availability of data from millions of mobile device users. DynamoDB is designed to handle large volumes of traffic while maintaining low-latency access to data. By employing high-availability configurations, such as setting up multiple replicas of data across different Availability Zones, you can protect against data loss due to hardware failures and ensure that the application remains responsive even during peak load times. Moreover, DynamoDB automatically manages the replication of data and offers built-in features such as failure recovery and automatic scaling, which are crucial for applications that require consistent performance despite fluctuations in demand. This ability to scale horizontally based on the traffic load is particularly valuable when handling data from a large user base, ensuring that users consistently have access to data without interruption. In contrast, storing data temporarily in an S3 bucket could lead to increased latency and potential availability issues since S3 is primarily designed for long-term data storage rather than real-time access. Using relational databases for immediate processing might not be optimal in terms of scalability and performance, especially with high read/write activities typically generated from mobile users. Additionally, directly storing data in Amazon EC2 instances presents risks related to single points of failure and requires