AWS Certified Developer Associate Practice Exam

One read capacity unit represents one strongly consistent read per second. In Amazon DynamoDB, a strongly consistent read retrieves the most up-to-date data, ensuring that any changes made to the item are reflected in the read; thus, it consumes one read capacity unit for each strongly consistent read.

This means that if you require strong consistency in your applications, you need to provision enough read capacity units to handle the total number of strongly consistent reads per second. The other options refer to eventual consistency, where one read capacity unit can serve up to two eventual consistent reads per second, but for the context of strongly consistent reads, the correct representation is limited to one. Understanding this distinction is crucial for efficiently managing read capacity in DynamoDB based on your application's consistency requirements.