AWS Certified Developer – Associate — Question 171

An organization is storing large files in Amazon S3, and is writing a web application to display meta-data about the files to end-users. Based on the metadata a user selects an object to download. The organization needs a mechanism to index the files and provide single-digit millisecond latency retrieval for the metadata.

What AWS service should be used to accomplish this?

Answer options

• A. Amazon DynamoDB
• B. Amazon EC2
• C. AWS Lambda
• D. Amazon RDS

Correct answer: A

Explanation

Amazon DynamoDB is the correct choice because it is a fully managed NoSQL database service that provides single-digit millisecond response times, making it ideal for indexing and retrieving metadata quickly. Amazon EC2 and AWS Lambda are not designed specifically for indexing data, while Amazon RDS, being a relational database service, may not offer the same level of retrieval speed for large datasets compared to DynamoDB.